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Finding the Fourth Proportional to 21,064.59, 31,600.13 and 7,019.82

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Solution

The fourth proportional to 21,064.59, 31,600.13 and 7,019.82 is: 10,530.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,064.59 : 31,600.13 = 7,019.82 : x
  2. Step 2: Convert to fraction form
    21,064.59/31,600.13 = 7,019.82/x
  3. Step 3: Cross multiply
    21,064.59x = 31,600.13 × 7,019.82
  4. Step 4: Simplify right side
    21,064.59x = 221,827,189.48
  5. Step 5: Solve for x
    x = 221,827,189.48/21,064.59
  6. Step 6: Final answer
    x = 10,530.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.