Home / 28,358.06-39,134.23-15,782.81

Finding the Fourth Proportional to 28,358.06, 39,134.23 and 15,782.81

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Solution

The fourth proportional to 28,358.06, 39,134.23 and 15,782.81 is: 21,780.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.06 : 39,134.23 = 15,782.81 : x
  2. Step 2: Convert to fraction form
    28,358.06/39,134.23 = 15,782.81/x
  3. Step 3: Cross multiply
    28,358.06x = 39,134.23 × 15,782.81
  4. Step 4: Simplify right side
    28,358.06x = 617,648,116.59
  5. Step 5: Solve for x
    x = 617,648,116.59/28,358.06
  6. Step 6: Final answer
    x = 21,780.34

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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.