Home / 21,721.83-29,981.22-14,155.08

Finding the Fourth Proportional to 21,721.83, 29,981.22 and 14,155.08

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Solution

The fourth proportional to 21,721.83, 29,981.22 and 14,155.08 is: 19,537.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,721.83 : 29,981.22 = 14,155.08 : x
  2. Step 2: Convert to fraction form
    21,721.83/29,981.22 = 14,155.08/x
  3. Step 3: Cross multiply
    21,721.83x = 29,981.22 × 14,155.08
  4. Step 4: Simplify right side
    21,721.83x = 424,386,567.60
  5. Step 5: Solve for x
    x = 424,386,567.60/21,721.83
  6. Step 6: Final answer
    x = 19,537.33

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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.