Home / 21,812.52-32,690.88-18,989.76

Finding the Fourth Proportional to 21,812.52, 32,690.88 and 18,989.76

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Solution

The fourth proportional to 21,812.52, 32,690.88 and 18,989.76 is: 28,460.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,812.52 : 32,690.88 = 18,989.76 : x
  2. Step 2: Convert to fraction form
    21,812.52/32,690.88 = 18,989.76/x
  3. Step 3: Cross multiply
    21,812.52x = 32,690.88 × 18,989.76
  4. Step 4: Simplify right side
    21,812.52x = 620,791,965.39
  5. Step 5: Solve for x
    x = 620,791,965.39/21,812.52
  6. Step 6: Final answer
    x = 28,460.35

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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.