Home / 38,639.47-53,323.15-21,643.57

Finding the Fourth Proportional to 38,639.47, 53,323.15 and 21,643.57

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Solution

The fourth proportional to 38,639.47, 53,323.15 and 21,643.57 is: 29,868.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,639.47 : 53,323.15 = 21,643.57 : x
  2. Step 2: Convert to fraction form
    38,639.47/53,323.15 = 21,643.57/x
  3. Step 3: Cross multiply
    38,639.47x = 53,323.15 × 21,643.57
  4. Step 4: Simplify right side
    38,639.47x = 1,154,103,221.43
  5. Step 5: Solve for x
    x = 1,154,103,221.43/38,639.47
  6. Step 6: Final answer
    x = 29,868.51

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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.