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Finding the Fourth Proportional to 8,919.60, 12,303.40 and 7,029.12

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Solution

The fourth proportional to 8,919.60, 12,303.40 and 7,029.12 is: 9,695.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.60 : 12,303.40 = 7,029.12 : x
  2. Step 2: Convert to fraction form
    8,919.60/12,303.40 = 7,029.12/x
  3. Step 3: Cross multiply
    8,919.60x = 12,303.40 × 7,029.12
  4. Step 4: Simplify right side
    8,919.60x = 86,482,075.01
  5. Step 5: Solve for x
    x = 86,482,075.01/8,919.60
  6. Step 6: Final answer
    x = 9,695.73

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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.