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Finding the Fourth Proportional to 6,590.40, 9,885.60 and 6,475.20

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Solution

The fourth proportional to 6,590.40, 9,885.60 and 6,475.20 is: 9,712.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,590.40 : 9,885.60 = 6,475.20 : x
  2. Step 2: Convert to fraction form
    6,590.40/9,885.60 = 6,475.20/x
  3. Step 3: Cross multiply
    6,590.40x = 9,885.60 × 6,475.20
  4. Step 4: Simplify right side
    6,590.40x = 64,011,237.12
  5. Step 5: Solve for x
    x = 64,011,237.12/6,590.40
  6. Step 6: Final answer
    x = 9,712.80

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.