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Finding the Fourth Proportional to 22,320.51, 30,802.05 and 12,888.87

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Solution

The fourth proportional to 22,320.51, 30,802.05 and 12,888.87 is: 17,786.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,320.51 : 30,802.05 = 12,888.87 : x
  2. Step 2: Convert to fraction form
    22,320.51/30,802.05 = 12,888.87/x
  3. Step 3: Cross multiply
    22,320.51x = 30,802.05 × 12,888.87
  4. Step 4: Simplify right side
    22,320.51x = 397,003,618.18
  5. Step 5: Solve for x
    x = 397,003,618.18/22,320.51
  6. Step 6: Final answer
    x = 17,786.49

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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.