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Finding the Fourth Proportional to 27,885.54, 38,482.11 and 15,311.10

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Solution

The fourth proportional to 27,885.54, 38,482.11 and 15,311.10 is: 21,129.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,885.54 : 38,482.11 = 15,311.10 : x
  2. Step 2: Convert to fraction form
    27,885.54/38,482.11 = 15,311.10/x
  3. Step 3: Cross multiply
    27,885.54x = 38,482.11 × 15,311.10
  4. Step 4: Simplify right side
    27,885.54x = 589,203,434.42
  5. Step 5: Solve for x
    x = 589,203,434.42/27,885.54
  6. Step 6: Final answer
    x = 21,129.35

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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.