Home / 38,510.78-53,141.47-21,512.72

Finding the Fourth Proportional to 38,510.78, 53,141.47 and 21,512.72

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Solution

The fourth proportional to 38,510.78, 53,141.47 and 21,512.72 is: 29,685.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,510.78 : 53,141.47 = 21,512.72 : x
  2. Step 2: Convert to fraction form
    38,510.78/53,141.47 = 21,512.72/x
  3. Step 3: Cross multiply
    38,510.78x = 53,141.47 × 21,512.72
  4. Step 4: Simplify right side
    38,510.78x = 1,143,217,643.57
  5. Step 5: Solve for x
    x = 1,143,217,643.57/38,510.78
  6. Step 6: Final answer
    x = 29,685.66

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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.