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Finding the Fourth Proportional to 12,900.92, 17,803.47 and 7,236.93

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Solution

The fourth proportional to 12,900.92, 17,803.47 and 7,236.93 is: 9,987.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,900.92 : 17,803.47 = 7,236.93 : x
  2. Step 2: Convert to fraction form
    12,900.92/17,803.47 = 7,236.93/x
  3. Step 3: Cross multiply
    12,900.92x = 17,803.47 × 7,236.93
  4. Step 4: Simplify right side
    12,900.92x = 128,842,466.15
  5. Step 5: Solve for x
    x = 128,842,466.15/12,900.92
  6. Step 6: Final answer
    x = 9,987.08

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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.