Home / 15,129.42-20,877.38-8,415.06

Finding the Fourth Proportional to 15,129.42, 20,877.38 and 8,415.06

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Solution

The fourth proportional to 15,129.42, 20,877.38 and 8,415.06 is: 11,612.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.42 : 20,877.38 = 8,415.06 : x
  2. Step 2: Convert to fraction form
    15,129.42/20,877.38 = 8,415.06/x
  3. Step 3: Cross multiply
    15,129.42x = 20,877.38 × 8,415.06
  4. Step 4: Simplify right side
    15,129.42x = 175,684,405.34
  5. Step 5: Solve for x
    x = 175,684,405.34/15,129.42
  6. Step 6: Final answer
    x = 11,612.10

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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.