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Finding the Fourth Proportional to 12,989.16, 17,924.98 and 7,020.82

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Solution

The fourth proportional to 12,989.16, 17,924.98 and 7,020.82 is: 9,688.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.16 : 17,924.98 = 7,020.82 : x
  2. Step 2: Convert to fraction form
    12,989.16/17,924.98 = 7,020.82/x
  3. Step 3: Cross multiply
    12,989.16x = 17,924.98 × 7,020.82
  4. Step 4: Simplify right side
    12,989.16x = 125,848,058.08
  5. Step 5: Solve for x
    x = 125,848,058.08/12,989.16
  6. Step 6: Final answer
    x = 9,688.70

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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.