Home / 15,142.92-20,886.04-10,428.72

Finding the Fourth Proportional to 15,142.92, 20,886.04 and 10,428.72

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Solution

The fourth proportional to 15,142.92, 20,886.04 and 10,428.72 is: 14,383.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,142.92 : 20,886.04 = 10,428.72 : x
  2. Step 2: Convert to fraction form
    15,142.92/20,886.04 = 10,428.72/x
  3. Step 3: Cross multiply
    15,142.92x = 20,886.04 × 10,428.72
  4. Step 4: Simplify right side
    15,142.92x = 217,814,663.07
  5. Step 5: Solve for x
    x = 217,814,663.07/15,142.92
  6. Step 6: Final answer
    x = 14,383.93

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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.