Home / 27,005.60-40,378.80-20,007.20

Finding the Fourth Proportional to 27,005.60, 40,378.80 and 20,007.20

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Solution

The fourth proportional to 27,005.60, 40,378.80 and 20,007.20 is: 29,914.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,005.60 : 40,378.80 = 20,007.20 : x
  2. Step 2: Convert to fraction form
    27,005.60/40,378.80 = 20,007.20/x
  3. Step 3: Cross multiply
    27,005.60x = 40,378.80 × 20,007.20
  4. Step 4: Simplify right side
    27,005.60x = 807,866,727.36
  5. Step 5: Solve for x
    x = 807,866,727.36/27,005.60
  6. Step 6: Final answer
    x = 29,914.79

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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.