Home / 39,789.60-59,722.80-20,090.40

Finding the Fourth Proportional to 39,789.60, 59,722.80 and 20,090.40

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Solution

The fourth proportional to 39,789.60, 59,722.80 and 20,090.40 is: 30,154.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,789.60 : 59,722.80 = 20,090.40 : x
  2. Step 2: Convert to fraction form
    39,789.60/59,722.80 = 20,090.40/x
  3. Step 3: Cross multiply
    39,789.60x = 59,722.80 × 20,090.40
  4. Step 4: Simplify right side
    39,789.60x = 1,199,854,941.12
  5. Step 5: Solve for x
    x = 1,199,854,941.12/39,789.60
  6. Step 6: Final answer
    x = 30,154.99

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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.