Home / 13,089.90-18,064.47-7,121.22

Finding the Fourth Proportional to 13,089.90, 18,064.47 and 7,121.22

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Solution

The fourth proportional to 13,089.90, 18,064.47 and 7,121.22 is: 9,827.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,089.90 : 18,064.47 = 7,121.22 : x
  2. Step 2: Convert to fraction form
    13,089.90/18,064.47 = 7,121.22/x
  3. Step 3: Cross multiply
    13,089.90x = 18,064.47 × 7,121.22
  4. Step 4: Simplify right side
    13,089.90x = 128,640,983.96
  5. Step 5: Solve for x
    x = 128,640,983.96/13,089.90
  6. Step 6: Final answer
    x = 9,827.50

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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.