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Finding the Fourth Proportional to 12,998.76, 19,485.18 and 6,415.08

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Solution

The fourth proportional to 12,998.76, 19,485.18 and 6,415.08 is: 9,616.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,998.76 : 19,485.18 = 6,415.08 : x
  2. Step 2: Convert to fraction form
    12,998.76/19,485.18 = 6,415.08/x
  3. Step 3: Cross multiply
    12,998.76x = 19,485.18 × 6,415.08
  4. Step 4: Simplify right side
    12,998.76x = 124,998,988.51
  5. Step 5: Solve for x
    x = 124,998,988.51/12,998.76
  6. Step 6: Final answer
    x = 9,616.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.