Home / 21,985.68-30,334.86-13,035.30

Finding the Fourth Proportional to 21,985.68, 30,334.86 and 13,035.30

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Solution

The fourth proportional to 21,985.68, 30,334.86 and 13,035.30 is: 17,985.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.68 : 30,334.86 = 13,035.30 : x
  2. Step 2: Convert to fraction form
    21,985.68/30,334.86 = 13,035.30/x
  3. Step 3: Cross multiply
    21,985.68x = 30,334.86 × 13,035.30
  4. Step 4: Simplify right side
    21,985.68x = 395,424,000.56
  5. Step 5: Solve for x
    x = 395,424,000.56/21,985.68
  6. Step 6: Final answer
    x = 17,985.53

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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.