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Finding the Fourth Proportional to 21,893.29, 30,210.55 and 12,332.91

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Solution

The fourth proportional to 21,893.29, 30,210.55 and 12,332.91 is: 17,018.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,893.29 : 30,210.55 = 12,332.91 : x
  2. Step 2: Convert to fraction form
    21,893.29/30,210.55 = 12,332.91/x
  3. Step 3: Cross multiply
    21,893.29x = 30,210.55 × 12,332.91
  4. Step 4: Simplify right side
    21,893.29x = 372,583,994.20
  5. Step 5: Solve for x
    x = 372,583,994.20/21,893.29
  6. Step 6: Final answer
    x = 17,018.18

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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.