Home / 21,931.40-32,860.20-12,077.60

Finding the Fourth Proportional to 21,931.40, 32,860.20 and 12,077.60

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Solution

The fourth proportional to 21,931.40, 32,860.20 and 12,077.60 is: 18,096.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.40 : 32,860.20 = 12,077.60 : x
  2. Step 2: Convert to fraction form
    21,931.40/32,860.20 = 12,077.60/x
  3. Step 3: Cross multiply
    21,931.40x = 32,860.20 × 12,077.60
  4. Step 4: Simplify right side
    21,931.40x = 396,872,351.52
  5. Step 5: Solve for x
    x = 396,872,351.52/21,931.40
  6. Step 6: Final answer
    x = 18,096.08

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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.