Home / 21,280.29-29,370.06-12,787.14

Finding the Fourth Proportional to 21,280.29, 29,370.06 and 12,787.14

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Solution

The fourth proportional to 21,280.29, 29,370.06 and 12,787.14 is: 17,648.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.29 : 29,370.06 = 12,787.14 : x
  2. Step 2: Convert to fraction form
    21,280.29/29,370.06 = 12,787.14/x
  3. Step 3: Cross multiply
    21,280.29x = 29,370.06 × 12,787.14
  4. Step 4: Simplify right side
    21,280.29x = 375,559,069.03
  5. Step 5: Solve for x
    x = 375,559,069.03/21,280.29
  6. Step 6: Final answer
    x = 17,648.21

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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.