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Finding the Fourth Proportional to 28,058.25, 38,721.20 and 15,483.81

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Solution

The fourth proportional to 28,058.25, 38,721.20 and 15,483.81 is: 21,368.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,058.25 : 38,721.20 = 15,483.81 : x
  2. Step 2: Convert to fraction form
    28,058.25/38,721.20 = 15,483.81/x
  3. Step 3: Cross multiply
    28,058.25x = 38,721.20 × 15,483.81
  4. Step 4: Simplify right side
    28,058.25x = 599,551,626.35
  5. Step 5: Solve for x
    x = 599,551,626.35/28,058.25
  6. Step 6: Final answer
    x = 21,368.10

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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.