Home / 21,158.89-29,184.11-13,980.49

Finding the Fourth Proportional to 21,158.89, 29,184.11 and 13,980.49

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Solution

The fourth proportional to 21,158.89, 29,184.11 and 13,980.49 is: 19,283.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.89 : 29,184.11 = 13,980.49 : x
  2. Step 2: Convert to fraction form
    21,158.89/29,184.11 = 13,980.49/x
  3. Step 3: Cross multiply
    21,158.89x = 29,184.11 × 13,980.49
  4. Step 4: Simplify right side
    21,158.89x = 408,008,088.11
  5. Step 5: Solve for x
    x = 408,008,088.11/21,158.89
  6. Step 6: Final answer
    x = 19,283.06

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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.