Home / 21,851.04-30,154.68-12,419.76

Finding the Fourth Proportional to 21,851.04, 30,154.68 and 12,419.76

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Solution

The fourth proportional to 21,851.04, 30,154.68 and 12,419.76 is: 17,139.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,851.04 : 30,154.68 = 12,419.76 : x
  2. Step 2: Convert to fraction form
    21,851.04/30,154.68 = 12,419.76/x
  3. Step 3: Cross multiply
    21,851.04x = 30,154.68 × 12,419.76
  4. Step 4: Simplify right side
    21,851.04x = 374,513,888.48
  5. Step 5: Solve for x
    x = 374,513,888.48/21,851.04
  6. Step 6: Final answer
    x = 17,139.41

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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.