Home / 19,697.59-27,172.15-13,315.80

Finding the Fourth Proportional to 19,697.59, 27,172.15 and 13,315.80

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Solution

The fourth proportional to 19,697.59, 27,172.15 and 13,315.80 is: 18,368.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,697.59 : 27,172.15 = 13,315.80 : x
  2. Step 2: Convert to fraction form
    19,697.59/27,172.15 = 13,315.80/x
  3. Step 3: Cross multiply
    19,697.59x = 27,172.15 × 13,315.80
  4. Step 4: Simplify right side
    19,697.59x = 361,818,881.68
  5. Step 5: Solve for x
    x = 361,818,881.68/19,697.59
  6. Step 6: Final answer
    x = 18,368.69

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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.