Home / 21,341.67-29,451.77-12,389.55

Finding the Fourth Proportional to 21,341.67, 29,451.77 and 12,389.55

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Solution

The fourth proportional to 21,341.67, 29,451.77 and 12,389.55 is: 17,097.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,341.67 : 29,451.77 = 12,389.55 : x
  2. Step 2: Convert to fraction form
    21,341.67/29,451.77 = 12,389.55/x
  3. Step 3: Cross multiply
    21,341.67x = 29,451.77 × 12,389.55
  4. Step 4: Simplify right side
    21,341.67x = 364,894,177.00
  5. Step 5: Solve for x
    x = 364,894,177.00/21,341.67
  6. Step 6: Final answer
    x = 17,097.73

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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.