Home / 13,681.78-18,880.80-7,394.14

Finding the Fourth Proportional to 13,681.78, 18,880.80 and 7,394.14

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Solution

The fourth proportional to 13,681.78, 18,880.80 and 7,394.14 is: 10,203.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,681.78 : 18,880.80 = 7,394.14 : x
  2. Step 2: Convert to fraction form
    13,681.78/18,880.80 = 7,394.14/x
  3. Step 3: Cross multiply
    13,681.78x = 18,880.80 × 7,394.14
  4. Step 4: Simplify right side
    13,681.78x = 139,607,278.51
  5. Step 5: Solve for x
    x = 139,607,278.51/13,681.78
  6. Step 6: Final answer
    x = 10,203.88

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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.