Home / 18,947.20-26,140.28-10,985.04

Finding the Fourth Proportional to 18,947.20, 26,140.28 and 10,985.04

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Solution

The fourth proportional to 18,947.20, 26,140.28 and 10,985.04 is: 15,155.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,947.20 : 26,140.28 = 10,985.04 : x
  2. Step 2: Convert to fraction form
    18,947.20/26,140.28 = 10,985.04/x
  3. Step 3: Cross multiply
    18,947.20x = 26,140.28 × 10,985.04
  4. Step 4: Simplify right side
    18,947.20x = 287,152,021.41
  5. Step 5: Solve for x
    x = 287,152,021.41/18,947.20
  6. Step 6: Final answer
    x = 15,155.38

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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.