Home / 28,235.47-38,965.15-15,488.75

Finding the Fourth Proportional to 28,235.47, 38,965.15 and 15,488.75

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Solution

The fourth proportional to 28,235.47, 38,965.15 and 15,488.75 is: 21,374.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,235.47 : 38,965.15 = 15,488.75 : x
  2. Step 2: Convert to fraction form
    28,235.47/38,965.15 = 15,488.75/x
  3. Step 3: Cross multiply
    28,235.47x = 38,965.15 × 15,488.75
  4. Step 4: Simplify right side
    28,235.47x = 603,521,467.06
  5. Step 5: Solve for x
    x = 603,521,467.06/28,235.47
  6. Step 6: Final answer
    x = 21,374.59

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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.