Home / 28,118.40-38,809.92-18,687.36

Finding the Fourth Proportional to 28,118.40, 38,809.92 and 18,687.36

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Solution

The fourth proportional to 28,118.40, 38,809.92 and 18,687.36 is: 25,792.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,118.40 : 38,809.92 = 18,687.36 : x
  2. Step 2: Convert to fraction form
    28,118.40/38,809.92 = 18,687.36/x
  3. Step 3: Cross multiply
    28,118.40x = 38,809.92 × 18,687.36
  4. Step 4: Simplify right side
    28,118.40x = 725,254,946.61
  5. Step 5: Solve for x
    x = 725,254,946.61/28,118.40
  6. Step 6: Final answer
    x = 25,792.90

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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.