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Finding the Fourth Proportional to 8,915.19, 13,441.20 and 8,312.87

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Solution

The fourth proportional to 8,915.19, 13,441.20 and 8,312.87 is: 12,533.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.19 : 13,441.20 = 8,312.87 : x
  2. Step 2: Convert to fraction form
    8,915.19/13,441.20 = 8,312.87/x
  3. Step 3: Cross multiply
    8,915.19x = 13,441.20 × 8,312.87
  4. Step 4: Simplify right side
    8,915.19x = 111,734,881.04
  5. Step 5: Solve for x
    x = 111,734,881.04/8,915.19
  6. Step 6: Final answer
    x = 12,533.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.