Home / 8,712.78-12,023.58-4,987.50

Finding the Fourth Proportional to 8,712.78, 12,023.58 and 4,987.50

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Solution

The fourth proportional to 8,712.78, 12,023.58 and 4,987.50 is: 6,882.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.78 : 12,023.58 = 4,987.50 : x
  2. Step 2: Convert to fraction form
    8,712.78/12,023.58 = 4,987.50/x
  3. Step 3: Cross multiply
    8,712.78x = 12,023.58 × 4,987.50
  4. Step 4: Simplify right side
    8,712.78x = 59,967,605.25
  5. Step 5: Solve for x
    x = 59,967,605.25/8,712.78
  6. Step 6: Final answer
    x = 6,882.72

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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.