Home / 39,013.95-53,838.87-21,108.57

Finding the Fourth Proportional to 39,013.95, 53,838.87 and 21,108.57

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Solution

The fourth proportional to 39,013.95, 53,838.87 and 21,108.57 is: 29,129.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,013.95 : 53,838.87 = 21,108.57 : x
  2. Step 2: Convert to fraction form
    39,013.95/53,838.87 = 21,108.57/x
  3. Step 3: Cross multiply
    39,013.95x = 53,838.87 × 21,108.57
  4. Step 4: Simplify right side
    39,013.95x = 1,136,461,286.92
  5. Step 5: Solve for x
    x = 1,136,461,286.92/39,013.95
  6. Step 6: Final answer
    x = 29,129.61

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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.