Home / 38,928.70-53,721.60-21,023.70

Finding the Fourth Proportional to 38,928.70, 53,721.60 and 21,023.70

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Solution

The fourth proportional to 38,928.70, 53,721.60 and 21,023.70 is: 29,012.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,928.70 : 53,721.60 = 21,023.70 : x
  2. Step 2: Convert to fraction form
    38,928.70/53,721.60 = 21,023.70/x
  3. Step 3: Cross multiply
    38,928.70x = 53,721.60 × 21,023.70
  4. Step 4: Simplify right side
    38,928.70x = 1,129,426,801.92
  5. Step 5: Solve for x
    x = 1,129,426,801.92/38,928.70
  6. Step 6: Final answer
    x = 29,012.70

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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.