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Finding the Fourth Proportional to 21,495.81, 29,665.54 and 12,064.38

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Solution

The fourth proportional to 21,495.81, 29,665.54 and 12,064.38 is: 16,649.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,495.81 : 29,665.54 = 12,064.38 : x
  2. Step 2: Convert to fraction form
    21,495.81/29,665.54 = 12,064.38/x
  3. Step 3: Cross multiply
    21,495.81x = 29,665.54 × 12,064.38
  4. Step 4: Simplify right side
    21,495.81x = 357,896,347.47
  5. Step 5: Solve for x
    x = 357,896,347.47/21,495.81
  6. Step 6: Final answer
    x = 16,649.59

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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.