Home / 25,688.20-35,444.28-15,621.88

Finding the Fourth Proportional to 25,688.20, 35,444.28 and 15,621.88

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Solution

The fourth proportional to 25,688.20, 35,444.28 and 15,621.88 is: 21,554.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,688.20 : 35,444.28 = 15,621.88 : x
  2. Step 2: Convert to fraction form
    25,688.20/35,444.28 = 15,621.88/x
  3. Step 3: Cross multiply
    25,688.20x = 35,444.28 × 15,621.88
  4. Step 4: Simplify right side
    25,688.20x = 553,706,288.85
  5. Step 5: Solve for x
    x = 553,706,288.85/25,688.20
  6. Step 6: Final answer
    x = 21,554.89

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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.