Home / 36,987.20-55,365.60-21,358.40

Finding the Fourth Proportional to 36,987.20, 55,365.60 and 21,358.40

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Solution

The fourth proportional to 36,987.20, 55,365.60 and 21,358.40 is: 31,971.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,987.20 : 55,365.60 = 21,358.40 : x
  2. Step 2: Convert to fraction form
    36,987.20/55,365.60 = 21,358.40/x
  3. Step 3: Cross multiply
    36,987.20x = 55,365.60 × 21,358.40
  4. Step 4: Simplify right side
    36,987.20x = 1,182,520,631.04
  5. Step 5: Solve for x
    x = 1,182,520,631.04/36,987.20
  6. Step 6: Final answer
    x = 31,971.08

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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.