Home / 30,530.19-42,130.51-17,100.78

Finding the Fourth Proportional to 30,530.19, 42,130.51 and 17,100.78

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Solution

The fourth proportional to 30,530.19, 42,130.51 and 17,100.78 is: 23,598.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,530.19 : 42,130.51 = 17,100.78 : x
  2. Step 2: Convert to fraction form
    30,530.19/42,130.51 = 17,100.78/x
  3. Step 3: Cross multiply
    30,530.19x = 42,130.51 × 17,100.78
  4. Step 4: Simplify right side
    30,530.19x = 720,464,582.80
  5. Step 5: Solve for x
    x = 720,464,582.80/30,530.19
  6. Step 6: Final answer
    x = 23,598.43

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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.