Home / 21,063.78-31,601.52-9,215.43

Finding the Fourth Proportional to 21,063.78, 31,601.52 and 9,215.43

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Solution

The fourth proportional to 21,063.78, 31,601.52 and 9,215.43 is: 13,825.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,063.78 : 31,601.52 = 9,215.43 : x
  2. Step 2: Convert to fraction form
    21,063.78/31,601.52 = 9,215.43/x
  3. Step 3: Cross multiply
    21,063.78x = 31,601.52 × 9,215.43
  4. Step 4: Simplify right side
    21,063.78x = 291,221,595.45
  5. Step 5: Solve for x
    x = 291,221,595.45/21,063.78
  6. Step 6: Final answer
    x = 13,825.70

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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.