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Finding the Fourth Proportional to 21,070, 29,074.44 and 12,118.24

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Solution

The fourth proportional to 21,070, 29,074.44 and 12,118.24 is: 16,721.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070 : 29,074.44 = 12,118.24 : x
  2. Step 2: Convert to fraction form
    21,070/29,074.44 = 12,118.24/x
  3. Step 3: Cross multiply
    21,070x = 29,074.44 × 12,118.24
  4. Step 4: Simplify right side
    21,070x = 352,331,041.79
  5. Step 5: Solve for x
    x = 352,331,041.79/21,070
  6. Step 6: Final answer
    x = 16,721.93

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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.