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Finding the Fourth Proportional to 15,745.10, 21,710.03 and 12,555.90

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Solution

The fourth proportional to 15,745.10, 21,710.03 and 12,555.90 is: 17,312.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745.10 : 21,710.03 = 12,555.90 : x
  2. Step 2: Convert to fraction form
    15,745.10/21,710.03 = 12,555.90/x
  3. Step 3: Cross multiply
    15,745.10x = 21,710.03 × 12,555.90
  4. Step 4: Simplify right side
    15,745.10x = 272,588,902.90
  5. Step 5: Solve for x
    x = 272,588,902.90/15,745.10
  6. Step 6: Final answer
    x = 17,312.62

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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.