Home / 9,918.90-13,688.19-5,726.88

Finding the Fourth Proportional to 9,918.90, 13,688.19 and 5,726.88

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Solution

The fourth proportional to 9,918.90, 13,688.19 and 5,726.88 is: 7,903.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918.90 : 13,688.19 = 5,726.88 : x
  2. Step 2: Convert to fraction form
    9,918.90/13,688.19 = 5,726.88/x
  3. Step 3: Cross multiply
    9,918.90x = 13,688.19 × 5,726.88
  4. Step 4: Simplify right side
    9,918.90x = 78,390,621.55
  5. Step 5: Solve for x
    x = 78,390,621.55/9,918.90
  6. Step 6: Final answer
    x = 7,903.16

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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.