Home / 28,155.88-38,856.33-15,580.63

Finding the Fourth Proportional to 28,155.88, 38,856.33 and 15,580.63

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Solution

The fourth proportional to 28,155.88, 38,856.33 and 15,580.63 is: 21,501.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,155.88 : 38,856.33 = 15,580.63 : x
  2. Step 2: Convert to fraction form
    28,155.88/38,856.33 = 15,580.63/x
  3. Step 3: Cross multiply
    28,155.88x = 38,856.33 × 15,580.63
  4. Step 4: Simplify right side
    28,155.88x = 605,405,828.70
  5. Step 5: Solve for x
    x = 605,405,828.70/28,155.88
  6. Step 6: Final answer
    x = 21,501.94

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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.