Home / 21,390.47-29,519.94-12,317.19

Finding the Fourth Proportional to 21,390.47, 29,519.94 and 12,317.19

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Solution

The fourth proportional to 21,390.47, 29,519.94 and 12,317.19 is: 16,998.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.47 : 29,519.94 = 12,317.19 : x
  2. Step 2: Convert to fraction form
    21,390.47/29,519.94 = 12,317.19/x
  3. Step 3: Cross multiply
    21,390.47x = 29,519.94 × 12,317.19
  4. Step 4: Simplify right side
    21,390.47x = 363,602,709.77
  5. Step 5: Solve for x
    x = 363,602,709.77/21,390.47
  6. Step 6: Final answer
    x = 16,998.35

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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.