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Finding the Fourth Proportional to 8,590.40, 12,866.40 and 6,627.20

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Solution

The fourth proportional to 8,590.40, 12,866.40 and 6,627.20 is: 9,925.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590.40 : 12,866.40 = 6,627.20 : x
  2. Step 2: Convert to fraction form
    8,590.40/12,866.40 = 6,627.20/x
  3. Step 3: Cross multiply
    8,590.40x = 12,866.40 × 6,627.20
  4. Step 4: Simplify right side
    8,590.40x = 85,268,206.08
  5. Step 5: Solve for x
    x = 85,268,206.08/8,590.40
  6. Step 6: Final answer
    x = 9,925.99

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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.