Home / 7,543.80-11,315.70-6,430.20

Finding the Fourth Proportional to 7,543.80, 11,315.70 and 6,430.20

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Solution

The fourth proportional to 7,543.80, 11,315.70 and 6,430.20 is: 9,645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,543.80 : 11,315.70 = 6,430.20 : x
  2. Step 2: Convert to fraction form
    7,543.80/11,315.70 = 6,430.20/x
  3. Step 3: Cross multiply
    7,543.80x = 11,315.70 × 6,430.20
  4. Step 4: Simplify right side
    7,543.80x = 72,762,214.14
  5. Step 5: Solve for x
    x = 72,762,214.14/7,543.80
  6. Step 6: Final answer
    x = 9,645.30

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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.