Home / 42,390.87-63,584.43-12,807.81

Finding the Fourth Proportional to 42,390.87, 63,584.43 and 12,807.81

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Solution

The fourth proportional to 42,390.87, 63,584.43 and 12,807.81 is: 19,211.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,390.87 : 63,584.43 = 12,807.81 : x
  2. Step 2: Convert to fraction form
    42,390.87/63,584.43 = 12,807.81/x
  3. Step 3: Cross multiply
    42,390.87x = 63,584.43 × 12,807.81
  4. Step 4: Simplify right side
    42,390.87x = 814,377,298.40
  5. Step 5: Solve for x
    x = 814,377,298.40/42,390.87
  6. Step 6: Final answer
    x = 19,211.15

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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.