Home / 25,781.76-35,585.28-15,840

Finding the Fourth Proportional to 25,781.76, 35,585.28 and 15,840

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Solution

The fourth proportional to 25,781.76, 35,585.28 and 15,840 is: 21,863.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,781.76 : 35,585.28 = 15,840 : x
  2. Step 2: Convert to fraction form
    25,781.76/35,585.28 = 15,840/x
  3. Step 3: Cross multiply
    25,781.76x = 35,585.28 × 15,840
  4. Step 4: Simplify right side
    25,781.76x = 563,670,835.20
  5. Step 5: Solve for x
    x = 563,670,835.20/25,781.76
  6. Step 6: Final answer
    x = 21,863.16

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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.