Home / 39,430.80-54,415.35-21,526.56

Finding the Fourth Proportional to 39,430.80, 54,415.35 and 21,526.56

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Solution

The fourth proportional to 39,430.80, 54,415.35 and 21,526.56 is: 29,707.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,430.80 : 54,415.35 = 21,526.56 : x
  2. Step 2: Convert to fraction form
    39,430.80/54,415.35 = 21,526.56/x
  3. Step 3: Cross multiply
    39,430.80x = 54,415.35 × 21,526.56
  4. Step 4: Simplify right side
    39,430.80x = 1,171,375,296.70
  5. Step 5: Solve for x
    x = 1,171,375,296.70/39,430.80
  6. Step 6: Final answer
    x = 29,707.11

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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.