Home / 21,121.89-29,159.78-14,417.52

Finding the Fourth Proportional to 21,121.89, 29,159.78 and 14,417.52

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Solution

The fourth proportional to 21,121.89, 29,159.78 and 14,417.52 is: 19,904.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.89 : 29,159.78 = 14,417.52 : x
  2. Step 2: Convert to fraction form
    21,121.89/29,159.78 = 14,417.52/x
  3. Step 3: Cross multiply
    21,121.89x = 29,159.78 × 14,417.52
  4. Step 4: Simplify right side
    21,121.89x = 420,411,639.26
  5. Step 5: Solve for x
    x = 420,411,639.26/21,121.89
  6. Step 6: Final answer
    x = 19,904.07

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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.