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Finding the Fourth Proportional to 14,312.40, 19,752.10 and 7,939.60

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Solution

The fourth proportional to 14,312.40, 19,752.10 and 7,939.60 is: 10,957.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,312.40 : 19,752.10 = 7,939.60 : x
  2. Step 2: Convert to fraction form
    14,312.40/19,752.10 = 7,939.60/x
  3. Step 3: Cross multiply
    14,312.40x = 19,752.10 × 7,939.60
  4. Step 4: Simplify right side
    14,312.40x = 156,823,773.16
  5. Step 5: Solve for x
    x = 156,823,773.16/14,312.40
  6. Step 6: Final answer
    x = 10,957.20

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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.