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Finding the Fourth Proportional to 8,851.80, 12,215.80 and 5,075.68

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Solution

The fourth proportional to 8,851.80, 12,215.80 and 5,075.68 is: 7,004.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,851.80 : 12,215.80 = 5,075.68 : x
  2. Step 2: Convert to fraction form
    8,851.80/12,215.80 = 5,075.68/x
  3. Step 3: Cross multiply
    8,851.80x = 12,215.80 × 5,075.68
  4. Step 4: Simplify right side
    8,851.80x = 62,003,491.74
  5. Step 5: Solve for x
    x = 62,003,491.74/8,851.80
  6. Step 6: Final answer
    x = 7,004.62

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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.