Home / 13,355.71-18,431.76-7,387.45

Finding the Fourth Proportional to 13,355.71, 18,431.76 and 7,387.45

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Solution

The fourth proportional to 13,355.71, 18,431.76 and 7,387.45 is: 10,195.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.71 : 18,431.76 = 7,387.45 : x
  2. Step 2: Convert to fraction form
    13,355.71/18,431.76 = 7,387.45/x
  3. Step 3: Cross multiply
    13,355.71x = 18,431.76 × 7,387.45
  4. Step 4: Simplify right side
    13,355.71x = 136,163,705.41
  5. Step 5: Solve for x
    x = 136,163,705.41/13,355.71
  6. Step 6: Final answer
    x = 10,195.17

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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.