Home / 28,072.20-42,108.30-10,538.40

Finding the Fourth Proportional to 28,072.20, 42,108.30 and 10,538.40

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Solution

The fourth proportional to 28,072.20, 42,108.30 and 10,538.40 is: 15,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,072.20 : 42,108.30 = 10,538.40 : x
  2. Step 2: Convert to fraction form
    28,072.20/42,108.30 = 10,538.40/x
  3. Step 3: Cross multiply
    28,072.20x = 42,108.30 × 10,538.40
  4. Step 4: Simplify right side
    28,072.20x = 443,754,108.72
  5. Step 5: Solve for x
    x = 443,754,108.72/28,072.20
  6. Step 6: Final answer
    x = 15,807.60

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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.