Home / 21,103.25-31,665.87-15,307.70

Finding the Fourth Proportional to 21,103.25, 31,665.87 and 15,307.70

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Solution

The fourth proportional to 21,103.25, 31,665.87 and 15,307.70 is: 22,969.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.25 : 31,665.87 = 15,307.70 : x
  2. Step 2: Convert to fraction form
    21,103.25/31,665.87 = 15,307.70/x
  3. Step 3: Cross multiply
    21,103.25x = 31,665.87 × 15,307.70
  4. Step 4: Simplify right side
    21,103.25x = 484,731,479.87
  5. Step 5: Solve for x
    x = 484,731,479.87/21,103.25
  6. Step 6: Final answer
    x = 22,969.52

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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.