Home / 21,478.40-32,203.20-9,785.60

Finding the Fourth Proportional to 21,478.40, 32,203.20 and 9,785.60

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Solution

The fourth proportional to 21,478.40, 32,203.20 and 9,785.60 is: 14,671.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,478.40 : 32,203.20 = 9,785.60 : x
  2. Step 2: Convert to fraction form
    21,478.40/32,203.20 = 9,785.60/x
  3. Step 3: Cross multiply
    21,478.40x = 32,203.20 × 9,785.60
  4. Step 4: Simplify right side
    21,478.40x = 315,127,633.92
  5. Step 5: Solve for x
    x = 315,127,633.92/21,478.40
  6. Step 6: Final answer
    x = 14,671.84

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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.