Home / 39,225.81-54,131.72-21,320.78

Finding the Fourth Proportional to 39,225.81, 54,131.72 and 21,320.78

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Solution

The fourth proportional to 39,225.81, 54,131.72 and 21,320.78 is: 29,422.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,225.81 : 54,131.72 = 21,320.78 : x
  2. Step 2: Convert to fraction form
    39,225.81/54,131.72 = 21,320.78/x
  3. Step 3: Cross multiply
    39,225.81x = 54,131.72 × 21,320.78
  4. Step 4: Simplify right side
    39,225.81x = 1,154,130,521.87
  5. Step 5: Solve for x
    x = 1,154,130,521.87/39,225.81
  6. Step 6: Final answer
    x = 29,422.73

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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.