Home / 21,155.04-31,715.28-12,836.88

Finding the Fourth Proportional to 21,155.04, 31,715.28 and 12,836.88

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Solution

The fourth proportional to 21,155.04, 31,715.28 and 12,836.88 is: 19,244.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.04 : 31,715.28 = 12,836.88 : x
  2. Step 2: Convert to fraction form
    21,155.04/31,715.28 = 12,836.88/x
  3. Step 3: Cross multiply
    21,155.04x = 31,715.28 × 12,836.88
  4. Step 4: Simplify right side
    21,155.04x = 407,125,243.53
  5. Step 5: Solve for x
    x = 407,125,243.53/21,155.04
  6. Step 6: Final answer
    x = 19,244.83

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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.