Home / 42,505.08-63,759.89-12,920.64

Finding the Fourth Proportional to 42,505.08, 63,759.89 and 12,920.64

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Solution

The fourth proportional to 42,505.08, 63,759.89 and 12,920.64 is: 19,381.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,505.08 : 63,759.89 = 12,920.64 : x
  2. Step 2: Convert to fraction form
    42,505.08/63,759.89 = 12,920.64/x
  3. Step 3: Cross multiply
    42,505.08x = 63,759.89 × 12,920.64
  4. Step 4: Simplify right side
    42,505.08x = 823,818,585.13
  5. Step 5: Solve for x
    x = 823,818,585.13/42,505.08
  6. Step 6: Final answer
    x = 19,381.65

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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.