Home / 12,585.60-18,878.40-7,336.80

Finding the Fourth Proportional to 12,585.60, 18,878.40 and 7,336.80

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Solution

The fourth proportional to 12,585.60, 18,878.40 and 7,336.80 is: 11,005.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,585.60 : 18,878.40 = 7,336.80 : x
  2. Step 2: Convert to fraction form
    12,585.60/18,878.40 = 7,336.80/x
  3. Step 3: Cross multiply
    12,585.60x = 18,878.40 × 7,336.80
  4. Step 4: Simplify right side
    12,585.60x = 138,507,045.12
  5. Step 5: Solve for x
    x = 138,507,045.12/12,585.60
  6. Step 6: Final answer
    x = 11,005.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.