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Finding the Fourth Proportional to 14,389.76, 19,860.94 and 9,671.31

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Solution

The fourth proportional to 14,389.76, 19,860.94 and 9,671.31 is: 13,348.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,389.76 : 19,860.94 = 9,671.31 : x
  2. Step 2: Convert to fraction form
    14,389.76/19,860.94 = 9,671.31/x
  3. Step 3: Cross multiply
    14,389.76x = 19,860.94 × 9,671.31
  4. Step 4: Simplify right side
    14,389.76x = 192,081,283.45
  5. Step 5: Solve for x
    x = 192,081,283.45/14,389.76
  6. Step 6: Final answer
    x = 13,348.47

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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.