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Finding the Fourth Proportional to 8,870.10, 13,256.11 and 8,357.98

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Solution

The fourth proportional to 8,870.10, 13,256.11 and 8,357.98 is: 12,490.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,870.10 : 13,256.11 = 8,357.98 : x
  2. Step 2: Convert to fraction form
    8,870.10/13,256.11 = 8,357.98/x
  3. Step 3: Cross multiply
    8,870.10x = 13,256.11 × 8,357.98
  4. Step 4: Simplify right side
    8,870.10x = 110,794,302.26
  5. Step 5: Solve for x
    x = 110,794,302.26/8,870.10
  6. Step 6: Final answer
    x = 12,490.76

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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.