Home / 10,929.60-16,411.68-8,631.36

Finding the Fourth Proportional to 10,929.60, 16,411.68 and 8,631.36

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Solution

The fourth proportional to 10,929.60, 16,411.68 and 8,631.36 is: 12,960.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,929.60 : 16,411.68 = 8,631.36 : x
  2. Step 2: Convert to fraction form
    10,929.60/16,411.68 = 8,631.36/x
  3. Step 3: Cross multiply
    10,929.60x = 16,411.68 × 8,631.36
  4. Step 4: Simplify right side
    10,929.60x = 141,655,118.28
  5. Step 5: Solve for x
    x = 141,655,118.28/10,929.60
  6. Step 6: Final answer
    x = 12,960.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.