Home / 39,288.88-54,219.18-21,384.28

Finding the Fourth Proportional to 39,288.88, 54,219.18 and 21,384.28

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Solution

The fourth proportional to 39,288.88, 54,219.18 and 21,384.28 is: 29,510.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,288.88 : 54,219.18 = 21,384.28 : x
  2. Step 2: Convert to fraction form
    39,288.88/54,219.18 = 21,384.28/x
  3. Step 3: Cross multiply
    39,288.88x = 54,219.18 × 21,384.28
  4. Step 4: Simplify right side
    39,288.88x = 1,159,438,126.49
  5. Step 5: Solve for x
    x = 1,159,438,126.49/39,288.88
  6. Step 6: Final answer
    x = 29,510.59

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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.