Home / 28,178.28-38,886-15,603

Finding the Fourth Proportional to 28,178.28, 38,886 and 15,603

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Solution

The fourth proportional to 28,178.28, 38,886 and 15,603 is: 21,532.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.28 : 38,886 = 15,603 : x
  2. Step 2: Convert to fraction form
    28,178.28/38,886 = 15,603/x
  3. Step 3: Cross multiply
    28,178.28x = 38,886 × 15,603
  4. Step 4: Simplify right side
    28,178.28x = 606,738,258
  5. Step 5: Solve for x
    x = 606,738,258/28,178.28
  6. Step 6: Final answer
    x = 21,532.13

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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.