Home / 9,861.20-14,820.60-9,688.40

Finding the Fourth Proportional to 9,861.20, 14,820.60 and 9,688.40

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Solution

The fourth proportional to 9,861.20, 14,820.60 and 9,688.40 is: 14,560.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,861.20 : 14,820.60 = 9,688.40 : x
  2. Step 2: Convert to fraction form
    9,861.20/14,820.60 = 9,688.40/x
  3. Step 3: Cross multiply
    9,861.20x = 14,820.60 × 9,688.40
  4. Step 4: Simplify right side
    9,861.20x = 143,587,901.04
  5. Step 5: Solve for x
    x = 143,587,901.04/9,861.20
  6. Step 6: Final answer
    x = 14,560.90

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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.