Home / 8,721.60-12,036.81-5,184.78

Finding the Fourth Proportional to 8,721.60, 12,036.81 and 5,184.78

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Solution

The fourth proportional to 8,721.60, 12,036.81 and 5,184.78 is: 7,155.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.60 : 12,036.81 = 5,184.78 : x
  2. Step 2: Convert to fraction form
    8,721.60/12,036.81 = 5,184.78/x
  3. Step 3: Cross multiply
    8,721.60x = 12,036.81 × 5,184.78
  4. Step 4: Simplify right side
    8,721.60x = 62,408,211.75
  5. Step 5: Solve for x
    x = 62,408,211.75/8,721.60
  6. Step 6: Final answer
    x = 7,155.59

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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.