Home / 42,784.40-64,191.92-19,089.86

Finding the Fourth Proportional to 42,784.40, 64,191.92 and 19,089.86

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Solution

The fourth proportional to 42,784.40, 64,191.92 and 19,089.86 is: 28,641.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,784.40 : 64,191.92 = 19,089.86 : x
  2. Step 2: Convert to fraction form
    42,784.40/64,191.92 = 19,089.86/x
  3. Step 3: Cross multiply
    42,784.40x = 64,191.92 × 19,089.86
  4. Step 4: Simplify right side
    42,784.40x = 1,225,414,349.52
  5. Step 5: Solve for x
    x = 1,225,414,349.52/42,784.40
  6. Step 6: Final answer
    x = 28,641.61

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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.