Home / 21,569.29-29,759.81-12,618.99

Finding the Fourth Proportional to 21,569.29, 29,759.81 and 12,618.99

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Solution

The fourth proportional to 21,569.29, 29,759.81 and 12,618.99 is: 17,410.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,569.29 : 29,759.81 = 12,618.99 : x
  2. Step 2: Convert to fraction form
    21,569.29/29,759.81 = 12,618.99/x
  3. Step 3: Cross multiply
    21,569.29x = 29,759.81 × 12,618.99
  4. Step 4: Simplify right side
    21,569.29x = 375,538,681.70
  5. Step 5: Solve for x
    x = 375,538,681.70/21,569.29
  6. Step 6: Final answer
    x = 17,410.81

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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.