Home / 38,505.79-53,139.12-21,510.75

Finding the Fourth Proportional to 38,505.79, 53,139.12 and 21,510.75

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Solution

The fourth proportional to 38,505.79, 53,139.12 and 21,510.75 is: 29,685.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,505.79 : 53,139.12 = 21,510.75 : x
  2. Step 2: Convert to fraction form
    38,505.79/53,139.12 = 21,510.75/x
  3. Step 3: Cross multiply
    38,505.79x = 53,139.12 × 21,510.75
  4. Step 4: Simplify right side
    38,505.79x = 1,143,062,325.54
  5. Step 5: Solve for x
    x = 1,143,062,325.54/38,505.79
  6. Step 6: Final answer
    x = 29,685.47

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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.