Home / 5,280.32-7,920.48-2,117.68

Finding the Fourth Proportional to 5,280.32, 7,920.48 and 2,117.68

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Solution

The fourth proportional to 5,280.32, 7,920.48 and 2,117.68 is: 3,176.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.32 : 7,920.48 = 2,117.68 : x
  2. Step 2: Convert to fraction form
    5,280.32/7,920.48 = 2,117.68/x
  3. Step 3: Cross multiply
    5,280.32x = 7,920.48 × 2,117.68
  4. Step 4: Simplify right side
    5,280.32x = 16,773,030.23
  5. Step 5: Solve for x
    x = 16,773,030.23/5,280.32
  6. Step 6: Final answer
    x = 3,176.52

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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.