Home / 20,925.57-31,388.36-7,781.25

Finding the Fourth Proportional to 20,925.57, 31,388.36 and 7,781.25

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Solution

The fourth proportional to 20,925.57, 31,388.36 and 7,781.25 is: 11,671.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,925.57 : 31,388.36 = 7,781.25 : x
  2. Step 2: Convert to fraction form
    20,925.57/31,388.36 = 7,781.25/x
  3. Step 3: Cross multiply
    20,925.57x = 31,388.36 × 7,781.25
  4. Step 4: Simplify right side
    20,925.57x = 244,240,637.34
  5. Step 5: Solve for x
    x = 244,240,637.34/20,925.57
  6. Step 6: Final answer
    x = 11,671.88

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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.