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Finding the Fourth Proportional to 10,368.79, 14,312.07 and 9,839.86

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Solution

The fourth proportional to 10,368.79, 14,312.07 and 9,839.86 is: 13,581.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,368.79 : 14,312.07 = 9,839.86 : x
  2. Step 2: Convert to fraction form
    10,368.79/14,312.07 = 9,839.86/x
  3. Step 3: Cross multiply
    10,368.79x = 14,312.07 × 9,839.86
  4. Step 4: Simplify right side
    10,368.79x = 140,828,765.11
  5. Step 5: Solve for x
    x = 140,828,765.11/10,368.79
  6. Step 6: Final answer
    x = 13,581.99

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.