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Finding the Fourth Proportional to 14,793.71, 20,420.98 and 9,129.38

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Solution

The fourth proportional to 14,793.71, 20,420.98 and 9,129.38 is: 12,602.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,793.71 : 20,420.98 = 9,129.38 : x
  2. Step 2: Convert to fraction form
    14,793.71/20,420.98 = 9,129.38/x
  3. Step 3: Cross multiply
    14,793.71x = 20,420.98 × 9,129.38
  4. Step 4: Simplify right side
    14,793.71x = 186,430,761.46
  5. Step 5: Solve for x
    x = 186,430,761.46/14,793.71
  6. Step 6: Final answer
    x = 12,602.03

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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.