Home / 28,585.71-39,447.81-15,838.79

Finding the Fourth Proportional to 28,585.71, 39,447.81 and 15,838.79

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Solution

The fourth proportional to 28,585.71, 39,447.81 and 15,838.79 is: 21,857.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,585.71 : 39,447.81 = 15,838.79 : x
  2. Step 2: Convert to fraction form
    28,585.71/39,447.81 = 15,838.79/x
  3. Step 3: Cross multiply
    28,585.71x = 39,447.81 × 15,838.79
  4. Step 4: Simplify right side
    28,585.71x = 624,805,381.31
  5. Step 5: Solve for x
    x = 624,805,381.31/28,585.71
  6. Step 6: Final answer
    x = 21,857.26

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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.