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Finding the Fourth Proportional to 42,990.48, 64,489.74 and 14,906.16

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Solution

The fourth proportional to 42,990.48, 64,489.74 and 14,906.16 is: 22,360.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,990.48 : 64,489.74 = 14,906.16 : x
  2. Step 2: Convert to fraction form
    42,990.48/64,489.74 = 14,906.16/x
  3. Step 3: Cross multiply
    42,990.48x = 64,489.74 × 14,906.16
  4. Step 4: Simplify right side
    42,990.48x = 961,294,382.80
  5. Step 5: Solve for x
    x = 961,294,382.80/42,990.48
  6. Step 6: Final answer
    x = 22,360.63

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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.