Home / 28,509.08-42,765.38-10,978.93

Finding the Fourth Proportional to 28,509.08, 42,765.38 and 10,978.93

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Solution

The fourth proportional to 28,509.08, 42,765.38 and 10,978.93 is: 16,469.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,509.08 : 42,765.38 = 10,978.93 : x
  2. Step 2: Convert to fraction form
    28,509.08/42,765.38 = 10,978.93/x
  3. Step 3: Cross multiply
    28,509.08x = 42,765.38 × 10,978.93
  4. Step 4: Simplify right side
    28,509.08x = 469,518,033.98
  5. Step 5: Solve for x
    x = 469,518,033.98/28,509.08
  6. Step 6: Final answer
    x = 16,469.07

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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.