Home / 18,865.60-28,298.40-12,644.80

Finding the Fourth Proportional to 18,865.60, 28,298.40 and 12,644.80

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Solution

The fourth proportional to 18,865.60, 28,298.40 and 12,644.80 is: 18,967.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.60 : 28,298.40 = 12,644.80 : x
  2. Step 2: Convert to fraction form
    18,865.60/28,298.40 = 12,644.80/x
  3. Step 3: Cross multiply
    18,865.60x = 28,298.40 × 12,644.80
  4. Step 4: Simplify right side
    18,865.60x = 357,827,608.32
  5. Step 5: Solve for x
    x = 357,827,608.32/18,865.60
  6. Step 6: Final answer
    x = 18,967.20

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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.