Home / 10,078.71-15,120.50-9,911.34

Finding the Fourth Proportional to 10,078.71, 15,120.50 and 9,911.34

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Solution

The fourth proportional to 10,078.71, 15,120.50 and 9,911.34 is: 14,869.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,078.71 : 15,120.50 = 9,911.34 : x
  2. Step 2: Convert to fraction form
    10,078.71/15,120.50 = 9,911.34/x
  3. Step 3: Cross multiply
    10,078.71x = 15,120.50 × 9,911.34
  4. Step 4: Simplify right side
    10,078.71x = 149,864,366.91
  5. Step 5: Solve for x
    x = 149,864,366.91/10,078.71
  6. Step 6: Final answer
    x = 14,869.40

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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.