Home / 39,409.75-54,386.76-21,505.74

Finding the Fourth Proportional to 39,409.75, 54,386.76 and 21,505.74

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Solution

The fourth proportional to 39,409.75, 54,386.76 and 21,505.74 is: 29,678.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,409.75 : 54,386.76 = 21,505.74 : x
  2. Step 2: Convert to fraction form
    39,409.75/54,386.76 = 21,505.74/x
  3. Step 3: Cross multiply
    39,409.75x = 54,386.76 × 21,505.74
  4. Step 4: Simplify right side
    39,409.75x = 1,169,627,520.00
  5. Step 5: Solve for x
    x = 1,169,627,520.00/39,409.75
  6. Step 6: Final answer
    x = 29,678.63

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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.