Home / 21,330.14-31,981.50-8,858.76

Finding the Fourth Proportional to 21,330.14, 31,981.50 and 8,858.76

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Solution

The fourth proportional to 21,330.14, 31,981.50 and 8,858.76 is: 13,282.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.14 : 31,981.50 = 8,858.76 : x
  2. Step 2: Convert to fraction form
    21,330.14/31,981.50 = 8,858.76/x
  3. Step 3: Cross multiply
    21,330.14x = 31,981.50 × 8,858.76
  4. Step 4: Simplify right side
    21,330.14x = 283,316,432.94
  5. Step 5: Solve for x
    x = 283,316,432.94/21,330.14
  6. Step 6: Final answer
    x = 13,282.45

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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.