Home / 42,739.65-64,113.12-11,153.90

Finding the Fourth Proportional to 42,739.65, 64,113.12 and 11,153.90

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Solution

The fourth proportional to 42,739.65, 64,113.12 and 11,153.90 is: 16,731.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,739.65 : 64,113.12 = 11,153.90 : x
  2. Step 2: Convert to fraction form
    42,739.65/64,113.12 = 11,153.90/x
  3. Step 3: Cross multiply
    42,739.65x = 64,113.12 × 11,153.90
  4. Step 4: Simplify right side
    42,739.65x = 715,111,489.45
  5. Step 5: Solve for x
    x = 715,111,489.45/42,739.65
  6. Step 6: Final answer
    x = 16,731.80

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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.