Home / 15,655.01-21,609.79-9,689.36

Finding the Fourth Proportional to 15,655.01, 21,609.79 and 9,689.36

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Solution

The fourth proportional to 15,655.01, 21,609.79 and 9,689.36 is: 13,374.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,655.01 : 21,609.79 = 9,689.36 : x
  2. Step 2: Convert to fraction form
    15,655.01/21,609.79 = 9,689.36/x
  3. Step 3: Cross multiply
    15,655.01x = 21,609.79 × 9,689.36
  4. Step 4: Simplify right side
    15,655.01x = 209,384,902.56
  5. Step 5: Solve for x
    x = 209,384,902.56/15,655.01
  6. Step 6: Final answer
    x = 13,374.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.