Home / 15,135.66-20,876.04-10,421.46

Finding the Fourth Proportional to 15,135.66, 20,876.04 and 10,421.46

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Solution

The fourth proportional to 15,135.66, 20,876.04 and 10,421.46 is: 14,373.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,135.66 : 20,876.04 = 10,421.46 : x
  2. Step 2: Convert to fraction form
    15,135.66/20,876.04 = 10,421.46/x
  3. Step 3: Cross multiply
    15,135.66x = 20,876.04 × 10,421.46
  4. Step 4: Simplify right side
    15,135.66x = 217,558,815.82
  5. Step 5: Solve for x
    x = 217,558,815.82/15,135.66
  6. Step 6: Final answer
    x = 14,373.92

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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.