Home / 39,038.78-53,873.40-21,134.12

Finding the Fourth Proportional to 39,038.78, 53,873.40 and 21,134.12

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Solution

The fourth proportional to 39,038.78, 53,873.40 and 21,134.12 is: 29,165.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,038.78 : 53,873.40 = 21,134.12 : x
  2. Step 2: Convert to fraction form
    39,038.78/53,873.40 = 21,134.12/x
  3. Step 3: Cross multiply
    39,038.78x = 53,873.40 × 21,134.12
  4. Step 4: Simplify right side
    39,038.78x = 1,138,566,900.41
  5. Step 5: Solve for x
    x = 1,138,566,900.41/39,038.78
  6. Step 6: Final answer
    x = 29,165.02

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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.