Home / 30,708.48-42,378.51-17,280.21

Finding the Fourth Proportional to 30,708.48, 42,378.51 and 17,280.21

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Solution

The fourth proportional to 30,708.48, 42,378.51 and 17,280.21 is: 23,847.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,708.48 : 42,378.51 = 17,280.21 : x
  2. Step 2: Convert to fraction form
    30,708.48/42,378.51 = 17,280.21/x
  3. Step 3: Cross multiply
    30,708.48x = 42,378.51 × 17,280.21
  4. Step 4: Simplify right side
    30,708.48x = 732,309,552.29
  5. Step 5: Solve for x
    x = 732,309,552.29/30,708.48
  6. Step 6: Final answer
    x = 23,847.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.