Home / 30,748.80-42,437.86-18,810.20

Finding the Fourth Proportional to 30,748.80, 42,437.86 and 18,810.20

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Solution

The fourth proportional to 30,748.80, 42,437.86 and 18,810.20 is: 25,960.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,748.80 : 42,437.86 = 18,810.20 : x
  2. Step 2: Convert to fraction form
    30,748.80/42,437.86 = 18,810.20/x
  3. Step 3: Cross multiply
    30,748.80x = 42,437.86 × 18,810.20
  4. Step 4: Simplify right side
    30,748.80x = 798,264,634.17
  5. Step 5: Solve for x
    x = 798,264,634.17/30,748.80
  6. Step 6: Final answer
    x = 25,960.84

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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.