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Finding the Fourth Proportional to 12,796.16, 19,208.64 and 9,909.28

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Solution

The fourth proportional to 12,796.16, 19,208.64 and 9,909.28 is: 14,875.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,796.16 : 19,208.64 = 9,909.28 : x
  2. Step 2: Convert to fraction form
    12,796.16/19,208.64 = 9,909.28/x
  3. Step 3: Cross multiply
    12,796.16x = 19,208.64 × 9,909.28
  4. Step 4: Simplify right side
    12,796.16x = 190,343,792.18
  5. Step 5: Solve for x
    x = 190,343,792.18/12,796.16
  6. Step 6: Final answer
    x = 14,875.07

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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.