Home / 28,781.53-39,701.34-21,225.44

Finding the Fourth Proportional to 28,781.53, 39,701.34 and 21,225.44

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Solution

The fourth proportional to 28,781.53, 39,701.34 and 21,225.44 is: 29,278.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,781.53 : 39,701.34 = 21,225.44 : x
  2. Step 2: Convert to fraction form
    28,781.53/39,701.34 = 21,225.44/x
  3. Step 3: Cross multiply
    28,781.53x = 39,701.34 × 21,225.44
  4. Step 4: Simplify right side
    28,781.53x = 842,678,509.34
  5. Step 5: Solve for x
    x = 842,678,509.34/28,781.53
  6. Step 6: Final answer
    x = 29,278.45

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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.