Home / 8,985.79-12,405.68-5,633.20

Finding the Fourth Proportional to 8,985.79, 12,405.68 and 5,633.20

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Solution

The fourth proportional to 8,985.79, 12,405.68 and 5,633.20 is: 7,777.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.79 : 12,405.68 = 5,633.20 : x
  2. Step 2: Convert to fraction form
    8,985.79/12,405.68 = 5,633.20/x
  3. Step 3: Cross multiply
    8,985.79x = 12,405.68 × 5,633.20
  4. Step 4: Simplify right side
    8,985.79x = 69,883,631.10
  5. Step 5: Solve for x
    x = 69,883,631.10/8,985.79
  6. Step 6: Final answer
    x = 7,777.13

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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.