Home / 21,805.39-30,090.85-12,373.75

Finding the Fourth Proportional to 21,805.39, 30,090.85 and 12,373.75

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Solution

The fourth proportional to 21,805.39, 30,090.85 and 12,373.75 is: 17,075.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,805.39 : 30,090.85 = 12,373.75 : x
  2. Step 2: Convert to fraction form
    21,805.39/30,090.85 = 12,373.75/x
  3. Step 3: Cross multiply
    21,805.39x = 30,090.85 × 12,373.75
  4. Step 4: Simplify right side
    21,805.39x = 372,336,655.19
  5. Step 5: Solve for x
    x = 372,336,655.19/21,805.39
  6. Step 6: Final answer
    x = 17,075.44

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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.