Home / 42,390.60-63,585.90-12,805.35

Finding the Fourth Proportional to 42,390.60, 63,585.90 and 12,805.35

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Solution

The fourth proportional to 42,390.60, 63,585.90 and 12,805.35 is: 19,208.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,390.60 : 63,585.90 = 12,805.35 : x
  2. Step 2: Convert to fraction form
    42,390.60/63,585.90 = 12,805.35/x
  3. Step 3: Cross multiply
    42,390.60x = 63,585.90 × 12,805.35
  4. Step 4: Simplify right side
    42,390.60x = 814,239,704.57
  5. Step 5: Solve for x
    x = 814,239,704.57/42,390.60
  6. Step 6: Final answer
    x = 19,208.03

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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.