Home / 12,621.34-17,405.63-9,975.07

Finding the Fourth Proportional to 12,621.34, 17,405.63 and 9,975.07

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Solution

The fourth proportional to 12,621.34, 17,405.63 and 9,975.07 is: 13,756.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.34 : 17,405.63 = 9,975.07 : x
  2. Step 2: Convert to fraction form
    12,621.34/17,405.63 = 9,975.07/x
  3. Step 3: Cross multiply
    12,621.34x = 17,405.63 × 9,975.07
  4. Step 4: Simplify right side
    12,621.34x = 173,622,377.64
  5. Step 5: Solve for x
    x = 173,622,377.64/12,621.34
  6. Step 6: Final answer
    x = 13,756.26

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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.