Home / 39,343.78-54,293.71-21,438.93

Finding the Fourth Proportional to 39,343.78, 54,293.71 and 21,438.93

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Solution

The fourth proportional to 39,343.78, 54,293.71 and 21,438.93 is: 29,585.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,343.78 : 54,293.71 = 21,438.93 : x
  2. Step 2: Convert to fraction form
    39,343.78/54,293.71 = 21,438.93/x
  3. Step 3: Cross multiply
    39,343.78x = 54,293.71 × 21,438.93
  4. Step 4: Simplify right side
    39,343.78x = 1,163,999,048.13
  5. Step 5: Solve for x
    x = 1,163,999,048.13/39,343.78
  6. Step 6: Final answer
    x = 29,585.34

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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.