Home / 39,122.97-53,989.40-21,218.01

Finding the Fourth Proportional to 39,122.97, 53,989.40 and 21,218.01

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Solution

The fourth proportional to 39,122.97, 53,989.40 and 21,218.01 is: 29,280.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,122.97 : 53,989.40 = 21,218.01 : x
  2. Step 2: Convert to fraction form
    39,122.97/53,989.40 = 21,218.01/x
  3. Step 3: Cross multiply
    39,122.97x = 53,989.40 × 21,218.01
  4. Step 4: Simplify right side
    39,122.97x = 1,145,547,523.00
  5. Step 5: Solve for x
    x = 1,145,547,523.00/39,122.97
  6. Step 6: Final answer
    x = 29,280.69

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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.