Home / 15,135.90-20,887.21-8,762.76

Finding the Fourth Proportional to 15,135.90, 20,887.21 and 8,762.76

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Solution

The fourth proportional to 15,135.90, 20,887.21 and 8,762.76 is: 12,092.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,135.90 : 20,887.21 = 8,762.76 : x
  2. Step 2: Convert to fraction form
    15,135.90/20,887.21 = 8,762.76/x
  3. Step 3: Cross multiply
    15,135.90x = 20,887.21 × 8,762.76
  4. Step 4: Simplify right side
    15,135.90x = 183,029,567.04
  5. Step 5: Solve for x
    x = 183,029,567.04/15,135.90
  6. Step 6: Final answer
    x = 12,092.42

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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.