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Finding the Fourth Proportional to 12,901.60, 17,802.79 and 7,235.18

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Solution

The fourth proportional to 12,901.60, 17,802.79 and 7,235.18 is: 9,983.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,901.60 : 17,802.79 = 7,235.18 : x
  2. Step 2: Convert to fraction form
    12,901.60/17,802.79 = 7,235.18/x
  3. Step 3: Cross multiply
    12,901.60x = 17,802.79 × 7,235.18
  4. Step 4: Simplify right side
    12,901.60x = 128,806,349.81
  5. Step 5: Solve for x
    x = 128,806,349.81/12,901.60
  6. Step 6: Final answer
    x = 9,983.75

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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.