Home / 13,711.02-18,920.88-7,742.49

Finding the Fourth Proportional to 13,711.02, 18,920.88 and 7,742.49

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Solution

The fourth proportional to 13,711.02, 18,920.88 and 7,742.49 is: 10,684.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.02 : 18,920.88 = 7,742.49 : x
  2. Step 2: Convert to fraction form
    13,711.02/18,920.88 = 7,742.49/x
  3. Step 3: Cross multiply
    13,711.02x = 18,920.88 × 7,742.49
  4. Step 4: Simplify right side
    13,711.02x = 146,494,724.19
  5. Step 5: Solve for x
    x = 146,494,724.19/13,711.02
  6. Step 6: Final answer
    x = 10,684.45

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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.