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Finding the Fourth Proportional to 38,959.16, 53,762.88 and 21,963.20

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Solution

The fourth proportional to 38,959.16, 53,762.88 and 21,963.20 is: 30,308.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,959.16 : 53,762.88 = 21,963.20 : x
  2. Step 2: Convert to fraction form
    38,959.16/53,762.88 = 21,963.20/x
  3. Step 3: Cross multiply
    38,959.16x = 53,762.88 × 21,963.20
  4. Step 4: Simplify right side
    38,959.16x = 1,180,804,886.02
  5. Step 5: Solve for x
    x = 1,180,804,886.02/38,959.16
  6. Step 6: Final answer
    x = 30,308.79

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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.