Home / 15,129.18-20,878.56-8,845.20

Finding the Fourth Proportional to 15,129.18, 20,878.56 and 8,845.20

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Solution

The fourth proportional to 15,129.18, 20,878.56 and 8,845.20 is: 12,206.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.18 : 20,878.56 = 8,845.20 : x
  2. Step 2: Convert to fraction form
    15,129.18/20,878.56 = 8,845.20/x
  3. Step 3: Cross multiply
    15,129.18x = 20,878.56 × 8,845.20
  4. Step 4: Simplify right side
    15,129.18x = 184,675,038.91
  5. Step 5: Solve for x
    x = 184,675,038.91/15,129.18
  6. Step 6: Final answer
    x = 12,206.55

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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.