Home / 15,885.10-21,877.05-15,540.72

Finding the Fourth Proportional to 15,885.10, 21,877.05 and 15,540.72

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Solution

The fourth proportional to 15,885.10, 21,877.05 and 15,540.72 is: 21,402.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,885.10 : 21,877.05 = 15,540.72 : x
  2. Step 2: Convert to fraction form
    15,885.10/21,877.05 = 15,540.72/x
  3. Step 3: Cross multiply
    15,885.10x = 21,877.05 × 15,540.72
  4. Step 4: Simplify right side
    15,885.10x = 339,985,108.48
  5. Step 5: Solve for x
    x = 339,985,108.48/15,885.10
  6. Step 6: Final answer
    x = 21,402.77

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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.