Home / 39,186.70-54,077.47-21,281.56

Finding the Fourth Proportional to 39,186.70, 54,077.47 and 21,281.56

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Solution

The fourth proportional to 39,186.70, 54,077.47 and 21,281.56 is: 29,368.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,186.70 : 54,077.47 = 21,281.56 : x
  2. Step 2: Convert to fraction form
    39,186.70/54,077.47 = 21,281.56/x
  3. Step 3: Cross multiply
    39,186.70x = 54,077.47 × 21,281.56
  4. Step 4: Simplify right side
    39,186.70x = 1,150,852,922.45
  5. Step 5: Solve for x
    x = 1,150,852,922.45/39,186.70
  6. Step 6: Final answer
    x = 29,368.46

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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.