Home / 31,153.80-42,990.75-17,723.79

Finding the Fourth Proportional to 31,153.80, 42,990.75 and 17,723.79

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Solution

The fourth proportional to 31,153.80, 42,990.75 and 17,723.79 is: 24,457.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,153.80 : 42,990.75 = 17,723.79 : x
  2. Step 2: Convert to fraction form
    31,153.80/42,990.75 = 17,723.79/x
  3. Step 3: Cross multiply
    31,153.80x = 42,990.75 × 17,723.79
  4. Step 4: Simplify right side
    31,153.80x = 761,959,024.94
  5. Step 5: Solve for x
    x = 761,959,024.94/31,153.80
  6. Step 6: Final answer
    x = 24,457.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.