Home / 21,125.15-29,154.06-12,172.49

Finding the Fourth Proportional to 21,125.15, 29,154.06 and 12,172.49

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Solution

The fourth proportional to 21,125.15, 29,154.06 and 12,172.49 is: 16,798.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.15 : 29,154.06 = 12,172.49 : x
  2. Step 2: Convert to fraction form
    21,125.15/29,154.06 = 12,172.49/x
  3. Step 3: Cross multiply
    21,125.15x = 29,154.06 × 12,172.49
  4. Step 4: Simplify right side
    21,125.15x = 354,877,503.81
  5. Step 5: Solve for x
    x = 354,877,503.81/21,125.15
  6. Step 6: Final answer
    x = 16,798.82

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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.