Home / 19,211.10-28,820.43-8,117.70

Finding the Fourth Proportional to 19,211.10, 28,820.43 and 8,117.70

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Solution

The fourth proportional to 19,211.10, 28,820.43 and 8,117.70 is: 12,178.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,211.10 : 28,820.43 = 8,117.70 : x
  2. Step 2: Convert to fraction form
    19,211.10/28,820.43 = 8,117.70/x
  3. Step 3: Cross multiply
    19,211.10x = 28,820.43 × 8,117.70
  4. Step 4: Simplify right side
    19,211.10x = 233,955,604.61
  5. Step 5: Solve for x
    x = 233,955,604.61/19,211.10
  6. Step 6: Final answer
    x = 12,178.15

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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.