Home / 28,145.81-38,824.29-18,585.78

Finding the Fourth Proportional to 28,145.81, 38,824.29 and 18,585.78

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Solution

The fourth proportional to 28,145.81, 38,824.29 and 18,585.78 is: 25,637.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.81 : 38,824.29 = 18,585.78 : x
  2. Step 2: Convert to fraction form
    28,145.81/38,824.29 = 18,585.78/x
  3. Step 3: Cross multiply
    28,145.81x = 38,824.29 × 18,585.78
  4. Step 4: Simplify right side
    28,145.81x = 721,579,712.60
  5. Step 5: Solve for x
    x = 721,579,712.60/28,145.81
  6. Step 6: Final answer
    x = 25,637.20

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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.