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Finding the Fourth Proportional to 15,918.70, 23,903.55 and 12,658.90

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Solution

The fourth proportional to 15,918.70, 23,903.55 and 12,658.90 is: 19,008.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,918.70 : 23,903.55 = 12,658.90 : x
  2. Step 2: Convert to fraction form
    15,918.70/23,903.55 = 12,658.90/x
  3. Step 3: Cross multiply
    15,918.70x = 23,903.55 × 12,658.90
  4. Step 4: Simplify right side
    15,918.70x = 302,592,649.10
  5. Step 5: Solve for x
    x = 302,592,649.10/15,918.70
  6. Step 6: Final answer
    x = 19,008.63

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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.