Home / 10,918.90-15,052.19-8,681.68

Finding the Fourth Proportional to 10,918.90, 15,052.19 and 8,681.68

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Solution

The fourth proportional to 10,918.90, 15,052.19 and 8,681.68 is: 11,968.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,918.90 : 15,052.19 = 8,681.68 : x
  2. Step 2: Convert to fraction form
    10,918.90/15,052.19 = 8,681.68/x
  3. Step 3: Cross multiply
    10,918.90x = 15,052.19 × 8,681.68
  4. Step 4: Simplify right side
    10,918.90x = 130,678,296.88
  5. Step 5: Solve for x
    x = 130,678,296.88/10,918.90
  6. Step 6: Final answer
    x = 11,968.08

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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.