Home / 21,070.19-29,077.71-12,117.69

Finding the Fourth Proportional to 21,070.19, 29,077.71 and 12,117.69

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Solution

The fourth proportional to 21,070.19, 29,077.71 and 12,117.69 is: 16,722.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.19 : 29,077.71 = 12,117.69 : x
  2. Step 2: Convert to fraction form
    21,070.19/29,077.71 = 12,117.69/x
  3. Step 3: Cross multiply
    21,070.19x = 29,077.71 × 12,117.69
  4. Step 4: Simplify right side
    21,070.19x = 352,354,630.25
  5. Step 5: Solve for x
    x = 352,354,630.25/21,070.19
  6. Step 6: Final answer
    x = 16,722.90

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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.