Home / 20,878.02-31,316.73-5,295.65

Finding the Fourth Proportional to 20,878.02, 31,316.73 and 5,295.65

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Solution

The fourth proportional to 20,878.02, 31,316.73 and 5,295.65 is: 7,943.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.02 : 31,316.73 = 5,295.65 : x
  2. Step 2: Convert to fraction form
    20,878.02/31,316.73 = 5,295.65/x
  3. Step 3: Cross multiply
    20,878.02x = 31,316.73 × 5,295.65
  4. Step 4: Simplify right side
    20,878.02x = 165,842,441.22
  5. Step 5: Solve for x
    x = 165,842,441.22/20,878.02
  6. Step 6: Final answer
    x = 7,943.40

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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.