Home / 10,619.20-15,928.80-10,542.40

Finding the Fourth Proportional to 10,619.20, 15,928.80 and 10,542.40

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Solution

The fourth proportional to 10,619.20, 15,928.80 and 10,542.40 is: 15,813.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,619.20 : 15,928.80 = 10,542.40 : x
  2. Step 2: Convert to fraction form
    10,619.20/15,928.80 = 10,542.40/x
  3. Step 3: Cross multiply
    10,619.20x = 15,928.80 × 10,542.40
  4. Step 4: Simplify right side
    10,619.20x = 167,927,781.12
  5. Step 5: Solve for x
    x = 167,927,781.12/10,619.20
  6. Step 6: Final answer
    x = 15,813.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.