Home / 15,679.10-21,615.13-13,279.48

Finding the Fourth Proportional to 15,679.10, 21,615.13 and 13,279.48

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Solution

The fourth proportional to 15,679.10, 21,615.13 and 13,279.48 is: 18,307.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,679.10 : 21,615.13 = 13,279.48 : x
  2. Step 2: Convert to fraction form
    15,679.10/21,615.13 = 13,279.48/x
  3. Step 3: Cross multiply
    15,679.10x = 21,615.13 × 13,279.48
  4. Step 4: Simplify right side
    15,679.10x = 287,037,686.53
  5. Step 5: Solve for x
    x = 287,037,686.53/15,679.10
  6. Step 6: Final answer
    x = 18,307.03

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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.