Home / 21,069.69-29,077.03-12,117.20

Finding the Fourth Proportional to 21,069.69, 29,077.03 and 12,117.20

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Solution

The fourth proportional to 21,069.69, 29,077.03 and 12,117.20 is: 16,722.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,069.69 : 29,077.03 = 12,117.20 : x
  2. Step 2: Convert to fraction form
    21,069.69/29,077.03 = 12,117.20/x
  3. Step 3: Cross multiply
    21,069.69x = 29,077.03 × 12,117.20
  4. Step 4: Simplify right side
    21,069.69x = 352,331,989.52
  5. Step 5: Solve for x
    x = 352,331,989.52/21,069.69
  6. Step 6: Final answer
    x = 16,722.22

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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.