Home / 19,811.50-27,340.67-11,315

Finding the Fourth Proportional to 19,811.50, 27,340.67 and 11,315

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Solution

The fourth proportional to 19,811.50, 27,340.67 and 11,315 is: 15,615.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811.50 : 27,340.67 = 11,315 : x
  2. Step 2: Convert to fraction form
    19,811.50/27,340.67 = 11,315/x
  3. Step 3: Cross multiply
    19,811.50x = 27,340.67 × 11,315
  4. Step 4: Simplify right side
    19,811.50x = 309,359,681.05
  5. Step 5: Solve for x
    x = 309,359,681.05/19,811.50
  6. Step 6: Final answer
    x = 15,615.16

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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.