Home / 12,184.16-16,815.12-9,686.88

Finding the Fourth Proportional to 12,184.16, 16,815.12 and 9,686.88

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Solution

The fourth proportional to 12,184.16, 16,815.12 and 9,686.88 is: 13,368.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,184.16 : 16,815.12 = 9,686.88 : x
  2. Step 2: Convert to fraction form
    12,184.16/16,815.12 = 9,686.88/x
  3. Step 3: Cross multiply
    12,184.16x = 16,815.12 × 9,686.88
  4. Step 4: Simplify right side
    12,184.16x = 162,886,013.30
  5. Step 5: Solve for x
    x = 162,886,013.30/12,184.16
  6. Step 6: Final answer
    x = 13,368.68

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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.