Home / 28,178.79-38,886.25-15,603.27

Finding the Fourth Proportional to 28,178.79, 38,886.25 and 15,603.27

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Solution

The fourth proportional to 28,178.79, 38,886.25 and 15,603.27 is: 21,532.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.79 : 38,886.25 = 15,603.27 : x
  2. Step 2: Convert to fraction form
    28,178.79/38,886.25 = 15,603.27/x
  3. Step 3: Cross multiply
    28,178.79x = 38,886.25 × 15,603.27
  4. Step 4: Simplify right side
    28,178.79x = 606,752,658.04
  5. Step 5: Solve for x
    x = 606,752,658.04/28,178.79
  6. Step 6: Final answer
    x = 21,532.25

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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.