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Finding the Fourth Proportional to 38,807.64, 53,553.90 and 21,579.32

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Solution

The fourth proportional to 38,807.64, 53,553.90 and 21,579.32 is: 29,779.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,807.64 : 53,553.90 = 21,579.32 : x
  2. Step 2: Convert to fraction form
    38,807.64/53,553.90 = 21,579.32/x
  3. Step 3: Cross multiply
    38,807.64x = 53,553.90 × 21,579.32
  4. Step 4: Simplify right side
    38,807.64x = 1,155,656,705.38
  5. Step 5: Solve for x
    x = 1,155,656,705.38/38,807.64
  6. Step 6: Final answer
    x = 29,779.10

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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.