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Finding the Fourth Proportional to 15,153.13, 20,912.94 and 8,870.77

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Solution

The fourth proportional to 15,153.13, 20,912.94 and 8,870.77 is: 12,242.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.13 : 20,912.94 = 8,870.77 : x
  2. Step 2: Convert to fraction form
    15,153.13/20,912.94 = 8,870.77/x
  3. Step 3: Cross multiply
    15,153.13x = 20,912.94 × 8,870.77
  4. Step 4: Simplify right side
    15,153.13x = 185,513,880.76
  5. Step 5: Solve for x
    x = 185,513,880.76/15,153.13
  6. Step 6: Final answer
    x = 12,242.61

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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.