Home / 10,140.30-15,210.27-8,478.18

Finding the Fourth Proportional to 10,140.30, 15,210.27 and 8,478.18

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Solution

The fourth proportional to 10,140.30, 15,210.27 and 8,478.18 is: 12,717.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,140.30 : 15,210.27 = 8,478.18 : x
  2. Step 2: Convert to fraction form
    10,140.30/15,210.27 = 8,478.18/x
  3. Step 3: Cross multiply
    10,140.30x = 15,210.27 × 8,478.18
  4. Step 4: Simplify right side
    10,140.30x = 128,955,406.91
  5. Step 5: Solve for x
    x = 128,955,406.91/10,140.30
  6. Step 6: Final answer
    x = 12,717.12

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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.