Home / 28,722.89-39,643.27-18,637.17

Finding the Fourth Proportional to 28,722.89, 39,643.27 and 18,637.17

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Solution

The fourth proportional to 28,722.89, 39,643.27 and 18,637.17 is: 25,722.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,722.89 : 39,643.27 = 18,637.17 : x
  2. Step 2: Convert to fraction form
    28,722.89/39,643.27 = 18,637.17/x
  3. Step 3: Cross multiply
    28,722.89x = 39,643.27 × 18,637.17
  4. Step 4: Simplify right side
    28,722.89x = 738,838,315.75
  5. Step 5: Solve for x
    x = 738,838,315.75/28,722.89
  6. Step 6: Final answer
    x = 25,722.98

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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.