Home / 30,880.17-42,613.70-18,133.16

Finding the Fourth Proportional to 30,880.17, 42,613.70 and 18,133.16

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Solution

The fourth proportional to 30,880.17, 42,613.70 and 18,133.16 is: 25,023.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,880.17 : 42,613.70 = 18,133.16 : x
  2. Step 2: Convert to fraction form
    30,880.17/42,613.70 = 18,133.16/x
  3. Step 3: Cross multiply
    30,880.17x = 42,613.70 × 18,133.16
  4. Step 4: Simplify right side
    30,880.17x = 772,720,736.56
  5. Step 5: Solve for x
    x = 772,720,736.56/30,880.17
  6. Step 6: Final answer
    x = 25,023.20

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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.