Home / 39,904.74-55,065.47-21,999.69

Finding the Fourth Proportional to 39,904.74, 55,065.47 and 21,999.69

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Solution

The fourth proportional to 39,904.74, 55,065.47 and 21,999.69 is: 30,357.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,904.74 : 55,065.47 = 21,999.69 : x
  2. Step 2: Convert to fraction form
    39,904.74/55,065.47 = 21,999.69/x
  3. Step 3: Cross multiply
    39,904.74x = 55,065.47 × 21,999.69
  4. Step 4: Simplify right side
    39,904.74x = 1,211,423,159.71
  5. Step 5: Solve for x
    x = 1,211,423,159.71/39,904.74
  6. Step 6: Final answer
    x = 30,357.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.