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Finding the Fourth Proportional to 8,856.79, 13,215.80 and 7,925.95

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Solution

The fourth proportional to 8,856.79, 13,215.80 and 7,925.95 is: 11,826.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,856.79 : 13,215.80 = 7,925.95 : x
  2. Step 2: Convert to fraction form
    8,856.79/13,215.80 = 7,925.95/x
  3. Step 3: Cross multiply
    8,856.79x = 13,215.80 × 7,925.95
  4. Step 4: Simplify right side
    8,856.79x = 104,747,727.06
  5. Step 5: Solve for x
    x = 104,747,727.06/8,856.79
  6. Step 6: Final answer
    x = 11,826.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.