Home / 30,681.15-42,343.19-18,752.43

Finding the Fourth Proportional to 30,681.15, 42,343.19 and 18,752.43

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Solution

The fourth proportional to 30,681.15, 42,343.19 and 18,752.43 is: 25,880.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,681.15 : 42,343.19 = 18,752.43 : x
  2. Step 2: Convert to fraction form
    30,681.15/42,343.19 = 18,752.43/x
  3. Step 3: Cross multiply
    30,681.15x = 42,343.19 × 18,752.43
  4. Step 4: Simplify right side
    30,681.15x = 794,037,603.62
  5. Step 5: Solve for x
    x = 794,037,603.62/30,681.15
  6. Step 6: Final answer
    x = 25,880.31

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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.