Home / 21,770.48-30,031.08-13,385.36

Finding the Fourth Proportional to 21,770.48, 30,031.08 and 13,385.36

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Solution

The fourth proportional to 21,770.48, 30,031.08 and 13,385.36 is: 18,464.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,770.48 : 30,031.08 = 13,385.36 : x
  2. Step 2: Convert to fraction form
    21,770.48/30,031.08 = 13,385.36/x
  3. Step 3: Cross multiply
    21,770.48x = 30,031.08 × 13,385.36
  4. Step 4: Simplify right side
    21,770.48x = 401,976,816.99
  5. Step 5: Solve for x
    x = 401,976,816.99/21,770.48
  6. Step 6: Final answer
    x = 18,464.31

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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.