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Finding the Fourth Proportional to 14,412.49, 19,892.99 and 9,390.49

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Solution

The fourth proportional to 14,412.49, 19,892.99 and 9,390.49 is: 12,961.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,412.49 : 19,892.99 = 9,390.49 : x
  2. Step 2: Convert to fraction form
    14,412.49/19,892.99 = 9,390.49/x
  3. Step 3: Cross multiply
    14,412.49x = 19,892.99 × 9,390.49
  4. Step 4: Simplify right side
    14,412.49x = 186,804,897.41
  5. Step 5: Solve for x
    x = 186,804,897.41/14,412.49
  6. Step 6: Final answer
    x = 12,961.32

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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.