Home / 31,423.78-47,109.16-13,641.04

Finding the Fourth Proportional to 31,423.78, 47,109.16 and 13,641.04

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Solution

The fourth proportional to 31,423.78, 47,109.16 and 13,641.04 is: 20,450.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,423.78 : 47,109.16 = 13,641.04 : x
  2. Step 2: Convert to fraction form
    31,423.78/47,109.16 = 13,641.04/x
  3. Step 3: Cross multiply
    31,423.78x = 47,109.16 × 13,641.04
  4. Step 4: Simplify right side
    31,423.78x = 642,617,632.18
  5. Step 5: Solve for x
    x = 642,617,632.18/31,423.78
  6. Step 6: Final answer
    x = 20,450.05

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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.