Home / 15,853.67-21,878.01-9,139.26

Finding the Fourth Proportional to 15,853.67, 21,878.01 and 9,139.26

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Solution

The fourth proportional to 15,853.67, 21,878.01 and 9,139.26 is: 12,612.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,853.67 : 21,878.01 = 9,139.26 : x
  2. Step 2: Convert to fraction form
    15,853.67/21,878.01 = 9,139.26/x
  3. Step 3: Cross multiply
    15,853.67x = 21,878.01 × 9,139.26
  4. Step 4: Simplify right side
    15,853.67x = 199,948,821.67
  5. Step 5: Solve for x
    x = 199,948,821.67/15,853.67
  6. Step 6: Final answer
    x = 12,612.15

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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.