Home / 15,158.98-20,928.07-10,131.72

Finding the Fourth Proportional to 15,158.98, 20,928.07 and 10,131.72

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Solution

The fourth proportional to 15,158.98, 20,928.07 and 10,131.72 is: 13,987.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.98 : 20,928.07 = 10,131.72 : x
  2. Step 2: Convert to fraction form
    15,158.98/20,928.07 = 10,131.72/x
  3. Step 3: Cross multiply
    15,158.98x = 20,928.07 × 10,131.72
  4. Step 4: Simplify right side
    15,158.98x = 212,037,345.38
  5. Step 5: Solve for x
    x = 212,037,345.38/15,158.98
  6. Step 6: Final answer
    x = 13,987.57

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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.