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Finding the Fourth Proportional to 15,686.70, 23,530.05 and 5,156.70

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Solution

The fourth proportional to 15,686.70, 23,530.05 and 5,156.70 is: 7,735.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.70 : 23,530.05 = 5,156.70 : x
  2. Step 2: Convert to fraction form
    15,686.70/23,530.05 = 5,156.70/x
  3. Step 3: Cross multiply
    15,686.70x = 23,530.05 × 5,156.70
  4. Step 4: Simplify right side
    15,686.70x = 121,337,408.84
  5. Step 5: Solve for x
    x = 121,337,408.84/15,686.70
  6. Step 6: Final answer
    x = 7,735.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.