Home / 20,877.81-31,202.08-15,267.30

Finding the Fourth Proportional to 20,877.81, 31,202.08 and 15,267.30

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Solution

The fourth proportional to 20,877.81, 31,202.08 and 15,267.30 is: 22,817.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.81 : 31,202.08 = 15,267.30 : x
  2. Step 2: Convert to fraction form
    20,877.81/31,202.08 = 15,267.30/x
  3. Step 3: Cross multiply
    20,877.81x = 31,202.08 × 15,267.30
  4. Step 4: Simplify right side
    20,877.81x = 476,371,515.98
  5. Step 5: Solve for x
    x = 476,371,515.98/20,877.81
  6. Step 6: Final answer
    x = 22,817.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.