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Finding the Fourth Proportional to 21,598.65, 29,811.80 and 13,101.18

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Solution

The fourth proportional to 21,598.65, 29,811.80 and 13,101.18 is: 18,083.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,598.65 : 29,811.80 = 13,101.18 : x
  2. Step 2: Convert to fraction form
    21,598.65/29,811.80 = 13,101.18/x
  3. Step 3: Cross multiply
    21,598.65x = 29,811.80 × 13,101.18
  4. Step 4: Simplify right side
    21,598.65x = 390,569,692.42
  5. Step 5: Solve for x
    x = 390,569,692.42/21,598.65
  6. Step 6: Final answer
    x = 18,083.06

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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.