Home / 28,377.84-39,162.12-15,802.80

Finding the Fourth Proportional to 28,377.84, 39,162.12 and 15,802.80

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Solution

The fourth proportional to 28,377.84, 39,162.12 and 15,802.80 is: 21,808.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,377.84 : 39,162.12 = 15,802.80 : x
  2. Step 2: Convert to fraction form
    28,377.84/39,162.12 = 15,802.80/x
  3. Step 3: Cross multiply
    28,377.84x = 39,162.12 × 15,802.80
  4. Step 4: Simplify right side
    28,377.84x = 618,871,149.94
  5. Step 5: Solve for x
    x = 618,871,149.94/28,377.84
  6. Step 6: Final answer
    x = 21,808.25

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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.