Home / 28,489.79-39,312.51-15,742.22

Finding the Fourth Proportional to 28,489.79, 39,312.51 and 15,742.22

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Solution

The fourth proportional to 28,489.79, 39,312.51 and 15,742.22 is: 21,722.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489.79 : 39,312.51 = 15,742.22 : x
  2. Step 2: Convert to fraction form
    28,489.79/39,312.51 = 15,742.22/x
  3. Step 3: Cross multiply
    28,489.79x = 39,312.51 × 15,742.22
  4. Step 4: Simplify right side
    28,489.79x = 618,865,984.61
  5. Step 5: Solve for x
    x = 618,865,984.61/28,489.79
  6. Step 6: Final answer
    x = 21,722.38

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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.