Home / 21,070.20-29,077.72-12,117.70

Finding the Fourth Proportional to 21,070.20, 29,077.72 and 12,117.70

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Solution

The fourth proportional to 21,070.20, 29,077.72 and 12,117.70 is: 16,722.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.20 : 29,077.72 = 12,117.70 : x
  2. Step 2: Convert to fraction form
    21,070.20/29,077.72 = 12,117.70/x
  3. Step 3: Cross multiply
    21,070.20x = 29,077.72 × 12,117.70
  4. Step 4: Simplify right side
    21,070.20x = 352,354,881.67
  5. Step 5: Solve for x
    x = 352,354,881.67/21,070.20
  6. Step 6: Final answer
    x = 16,722.91

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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.