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Finding the Fourth Proportional to 7,157.16, 10,655.55 and 7,122.51

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Solution

The fourth proportional to 7,157.16, 10,655.55 and 7,122.51 is: 10,603.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,157.16 : 10,655.55 = 7,122.51 : x
  2. Step 2: Convert to fraction form
    7,157.16/10,655.55 = 7,122.51/x
  3. Step 3: Cross multiply
    7,157.16x = 10,655.55 × 7,122.51
  4. Step 4: Simplify right side
    7,157.16x = 75,894,261.43
  5. Step 5: Solve for x
    x = 75,894,261.43/7,157.16
  6. Step 6: Final answer
    x = 10,603.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.