Home / 10,371.20-14,312.16-6,390.72

Finding the Fourth Proportional to 10,371.20, 14,312.16 and 6,390.72

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Solution

The fourth proportional to 10,371.20, 14,312.16 and 6,390.72 is: 8,819.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,371.20 : 14,312.16 = 6,390.72 : x
  2. Step 2: Convert to fraction form
    10,371.20/14,312.16 = 6,390.72/x
  3. Step 3: Cross multiply
    10,371.20x = 14,312.16 × 6,390.72
  4. Step 4: Simplify right side
    10,371.20x = 91,465,007.16
  5. Step 5: Solve for x
    x = 91,465,007.16/10,371.20
  6. Step 6: Final answer
    x = 8,819.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.