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Finding the Fourth Proportional to 8,762.71, 13,080.94 and 8,139.93

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Solution

The fourth proportional to 8,762.71, 13,080.94 and 8,139.93 is: 12,151.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,762.71 : 13,080.94 = 8,139.93 : x
  2. Step 2: Convert to fraction form
    8,762.71/13,080.94 = 8,139.93/x
  3. Step 3: Cross multiply
    8,762.71x = 13,080.94 × 8,139.93
  4. Step 4: Simplify right side
    8,762.71x = 106,477,967.50
  5. Step 5: Solve for x
    x = 106,477,967.50/8,762.71
  6. Step 6: Final answer
    x = 12,151.26

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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.