Home / 25,931.40-38,864.70-18,997.80

Finding the Fourth Proportional to 25,931.40, 38,864.70 and 18,997.80

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Solution

The fourth proportional to 25,931.40, 38,864.70 and 18,997.80 is: 28,472.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,931.40 : 38,864.70 = 18,997.80 : x
  2. Step 2: Convert to fraction form
    25,931.40/38,864.70 = 18,997.80/x
  3. Step 3: Cross multiply
    25,931.40x = 38,864.70 × 18,997.80
  4. Step 4: Simplify right side
    25,931.40x = 738,343,797.66
  5. Step 5: Solve for x
    x = 738,343,797.66/25,931.40
  6. Step 6: Final answer
    x = 28,472.96

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1.5x scale

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.