Home / 15,680.79-21,638.06-9,306.29

Finding the Fourth Proportional to 15,680.79, 21,638.06 and 9,306.29

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Solution

The fourth proportional to 15,680.79, 21,638.06 and 9,306.29 is: 12,841.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,680.79 : 21,638.06 = 9,306.29 : x
  2. Step 2: Convert to fraction form
    15,680.79/21,638.06 = 9,306.29/x
  3. Step 3: Cross multiply
    15,680.79x = 21,638.06 × 9,306.29
  4. Step 4: Simplify right side
    15,680.79x = 201,370,061.40
  5. Step 5: Solve for x
    x = 201,370,061.40/15,680.79
  6. Step 6: Final answer
    x = 12,841.83

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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.