Home / 28,178.70-38,886.58-15,603.45

Finding the Fourth Proportional to 28,178.70, 38,886.58 and 15,603.45

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Solution

The fourth proportional to 28,178.70, 38,886.58 and 15,603.45 is: 21,532.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.70 : 38,886.58 = 15,603.45 : x
  2. Step 2: Convert to fraction form
    28,178.70/38,886.58 = 15,603.45/x
  3. Step 3: Cross multiply
    28,178.70x = 38,886.58 × 15,603.45
  4. Step 4: Simplify right side
    28,178.70x = 606,764,806.70
  5. Step 5: Solve for x
    x = 606,764,806.70/28,178.70
  6. Step 6: Final answer
    x = 21,532.75

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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.