Home / 20,876.81-31,200.59-15,266.30

Finding the Fourth Proportional to 20,876.81, 31,200.59 and 15,266.30

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Solution

The fourth proportional to 20,876.81, 31,200.59 and 15,266.30 is: 22,815.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.81 : 31,200.59 = 15,266.30 : x
  2. Step 2: Convert to fraction form
    20,876.81/31,200.59 = 15,266.30/x
  3. Step 3: Cross multiply
    20,876.81x = 31,200.59 × 15,266.30
  4. Step 4: Simplify right side
    20,876.81x = 476,317,567.12
  5. Step 5: Solve for x
    x = 476,317,567.12/20,876.81
  6. Step 6: Final answer
    x = 22,815.63

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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.