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Finding the Fourth Proportional to 42,129.99, 63,190.80 and 10,965.24

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Solution

The fourth proportional to 42,129.99, 63,190.80 and 10,965.24 is: 16,446.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,129.99 : 63,190.80 = 10,965.24 : x
  2. Step 2: Convert to fraction form
    42,129.99/63,190.80 = 10,965.24/x
  3. Step 3: Cross multiply
    42,129.99x = 63,190.80 × 10,965.24
  4. Step 4: Simplify right side
    42,129.99x = 692,902,287.79
  5. Step 5: Solve for x
    x = 692,902,287.79/42,129.99
  6. Step 6: Final answer
    x = 16,446.77

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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.