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Finding the Fourth Proportional to 10,005.48, 14,990.94 and 9,642.60

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Solution

The fourth proportional to 10,005.48, 14,990.94 and 9,642.60 is: 14,447.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,005.48 : 14,990.94 = 9,642.60 : x
  2. Step 2: Convert to fraction form
    10,005.48/14,990.94 = 9,642.60/x
  3. Step 3: Cross multiply
    10,005.48x = 14,990.94 × 9,642.60
  4. Step 4: Simplify right side
    10,005.48x = 144,551,638.04
  5. Step 5: Solve for x
    x = 144,551,638.04/10,005.48
  6. Step 6: Final answer
    x = 14,447.25

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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.