Home / 39,123.54-53,989.74-21,218.22

Finding the Fourth Proportional to 39,123.54, 53,989.74 and 21,218.22

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Solution

The fourth proportional to 39,123.54, 53,989.74 and 21,218.22 is: 29,280.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,123.54 : 53,989.74 = 21,218.22 : x
  2. Step 2: Convert to fraction form
    39,123.54/53,989.74 = 21,218.22/x
  3. Step 3: Cross multiply
    39,123.54x = 53,989.74 × 21,218.22
  4. Step 4: Simplify right side
    39,123.54x = 1,145,566,181.06
  5. Step 5: Solve for x
    x = 1,145,566,181.06/39,123.54
  6. Step 6: Final answer
    x = 29,280.74

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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.