Home / 15,689.82-21,631.01-13,442.07

Finding the Fourth Proportional to 15,689.82, 21,631.01 and 13,442.07

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Solution

The fourth proportional to 15,689.82, 21,631.01 and 13,442.07 is: 18,532.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.82 : 21,631.01 = 13,442.07 : x
  2. Step 2: Convert to fraction form
    15,689.82/21,631.01 = 13,442.07/x
  3. Step 3: Cross multiply
    15,689.82x = 21,631.01 × 13,442.07
  4. Step 4: Simplify right side
    15,689.82x = 290,765,483.38
  5. Step 5: Solve for x
    x = 290,765,483.38/15,689.82
  6. Step 6: Final answer
    x = 18,532.11

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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.