Home / 21,316.98-31,975.58-5,520.90

Finding the Fourth Proportional to 21,316.98, 31,975.58 and 5,520.90

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Solution

The fourth proportional to 21,316.98, 31,975.58 and 5,520.90 is: 8,281.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316.98 : 31,975.58 = 5,520.90 : x
  2. Step 2: Convert to fraction form
    21,316.98/31,975.58 = 5,520.90/x
  3. Step 3: Cross multiply
    21,316.98x = 31,975.58 × 5,520.90
  4. Step 4: Simplify right side
    21,316.98x = 176,533,979.62
  5. Step 5: Solve for x
    x = 176,533,979.62/21,316.98
  6. Step 6: Final answer
    x = 8,281.38

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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.