Home / 21,618.12-29,828.45-13,124.71

Finding the Fourth Proportional to 21,618.12, 29,828.45 and 13,124.71

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Solution

The fourth proportional to 21,618.12, 29,828.45 and 13,124.71 is: 18,109.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.12 : 29,828.45 = 13,124.71 : x
  2. Step 2: Convert to fraction form
    21,618.12/29,828.45 = 13,124.71/x
  3. Step 3: Cross multiply
    21,618.12x = 29,828.45 × 13,124.71
  4. Step 4: Simplify right side
    21,618.12x = 391,489,541.23
  5. Step 5: Solve for x
    x = 391,489,541.23/21,618.12
  6. Step 6: Final answer
    x = 18,109.32

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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.