Home / 21,685.07-29,925.44-12,125.30

Finding the Fourth Proportional to 21,685.07, 29,925.44 and 12,125.30

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Solution

The fourth proportional to 21,685.07, 29,925.44 and 12,125.30 is: 16,732.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,685.07 : 29,925.44 = 12,125.30 : x
  2. Step 2: Convert to fraction form
    21,685.07/29,925.44 = 12,125.30/x
  3. Step 3: Cross multiply
    21,685.07x = 29,925.44 × 12,125.30
  4. Step 4: Simplify right side
    21,685.07x = 362,854,937.63
  5. Step 5: Solve for x
    x = 362,854,937.63/21,685.07
  6. Step 6: Final answer
    x = 16,732.94

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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.