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Finding the Fourth Proportional to 19,345.80, 29,018.70 and 9,491.40

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Solution

The fourth proportional to 19,345.80, 29,018.70 and 9,491.40 is: 14,237.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,345.80 : 29,018.70 = 9,491.40 : x
  2. Step 2: Convert to fraction form
    19,345.80/29,018.70 = 9,491.40/x
  3. Step 3: Cross multiply
    19,345.80x = 29,018.70 × 9,491.40
  4. Step 4: Simplify right side
    19,345.80x = 275,428,089.18
  5. Step 5: Solve for x
    x = 275,428,089.18/19,345.80
  6. Step 6: Final answer
    x = 14,237.10

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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.