Home / 13,352.56-18,406.08-9,990.28

Finding the Fourth Proportional to 13,352.56, 18,406.08 and 9,990.28

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Solution

The fourth proportional to 13,352.56, 18,406.08 and 9,990.28 is: 13,771.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,352.56 : 18,406.08 = 9,990.28 : x
  2. Step 2: Convert to fraction form
    13,352.56/18,406.08 = 9,990.28/x
  3. Step 3: Cross multiply
    13,352.56x = 18,406.08 × 9,990.28
  4. Step 4: Simplify right side
    13,352.56x = 183,881,892.90
  5. Step 5: Solve for x
    x = 183,881,892.90/13,352.56
  6. Step 6: Final answer
    x = 13,771.28

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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.