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Finding the Fourth Proportional to 14,209.06, 19,607.79 and 7,920.22

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Solution

The fourth proportional to 14,209.06, 19,607.79 and 7,920.22 is: 10,929.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,209.06 : 19,607.79 = 7,920.22 : x
  2. Step 2: Convert to fraction form
    14,209.06/19,607.79 = 7,920.22/x
  3. Step 3: Cross multiply
    14,209.06x = 19,607.79 × 7,920.22
  4. Step 4: Simplify right side
    14,209.06x = 155,298,010.51
  5. Step 5: Solve for x
    x = 155,298,010.51/14,209.06
  6. Step 6: Final answer
    x = 10,929.51

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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.