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Finding the Fourth Proportional to 19,603.65, 29,387.66 and 7,118.31

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Solution

The fourth proportional to 19,603.65, 29,387.66 and 7,118.31 is: 10,671.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,603.65 : 29,387.66 = 7,118.31 : x
  2. Step 2: Convert to fraction form
    19,603.65/29,387.66 = 7,118.31/x
  3. Step 3: Cross multiply
    19,603.65x = 29,387.66 × 7,118.31
  4. Step 4: Simplify right side
    19,603.65x = 209,190,588.71
  5. Step 5: Solve for x
    x = 209,190,588.71/19,603.65
  6. Step 6: Final answer
    x = 10,671.00

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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.