Home / 15,143.26-20,898.69-8,428.87

Finding the Fourth Proportional to 15,143.26, 20,898.69 and 8,428.87

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Solution

The fourth proportional to 15,143.26, 20,898.69 and 8,428.87 is: 11,632.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,143.26 : 20,898.69 = 8,428.87 : x
  2. Step 2: Convert to fraction form
    15,143.26/20,898.69 = 8,428.87/x
  3. Step 3: Cross multiply
    15,143.26x = 20,898.69 × 8,428.87
  4. Step 4: Simplify right side
    15,143.26x = 176,152,341.18
  5. Step 5: Solve for x
    x = 176,152,341.18/15,143.26
  6. Step 6: Final answer
    x = 11,632.39

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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.