Home / 15,515.06-21,403.91-9,543.20

Finding the Fourth Proportional to 15,515.06, 21,403.91 and 9,543.20

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Solution

The fourth proportional to 15,515.06, 21,403.91 and 9,543.20 is: 13,165.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.06 : 21,403.91 = 9,543.20 : x
  2. Step 2: Convert to fraction form
    15,515.06/21,403.91 = 9,543.20/x
  3. Step 3: Cross multiply
    15,515.06x = 21,403.91 × 9,543.20
  4. Step 4: Simplify right side
    15,515.06x = 204,261,710.75
  5. Step 5: Solve for x
    x = 204,261,710.75/15,515.06
  6. Step 6: Final answer
    x = 13,165.39

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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.