Home / 30,988.31-42,764.15-18,410.63

Finding the Fourth Proportional to 30,988.31, 42,764.15 and 18,410.63

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Solution

The fourth proportional to 30,988.31, 42,764.15 and 18,410.63 is: 25,406.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,988.31 : 42,764.15 = 18,410.63 : x
  2. Step 2: Convert to fraction form
    30,988.31/42,764.15 = 18,410.63/x
  3. Step 3: Cross multiply
    30,988.31x = 42,764.15 × 18,410.63
  4. Step 4: Simplify right side
    30,988.31x = 787,314,775.12
  5. Step 5: Solve for x
    x = 787,314,775.12/30,988.31
  6. Step 6: Final answer
    x = 25,406.84

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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.