Home / 28,520.02-42,780.30-10,987.30

Finding the Fourth Proportional to 28,520.02, 42,780.30 and 10,987.30

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Solution

The fourth proportional to 28,520.02, 42,780.30 and 10,987.30 is: 16,481.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.02 : 42,780.30 = 10,987.30 : x
  2. Step 2: Convert to fraction form
    28,520.02/42,780.30 = 10,987.30/x
  3. Step 3: Cross multiply
    28,520.02x = 42,780.30 × 10,987.30
  4. Step 4: Simplify right side
    28,520.02x = 470,039,990.19
  5. Step 5: Solve for x
    x = 470,039,990.19/28,520.02
  6. Step 6: Final answer
    x = 16,481.05

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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.