Home / 21,149.16-31,678.07-19,907.00

Finding the Fourth Proportional to 21,149.16, 31,678.07 and 19,907.00

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Solution

The fourth proportional to 21,149.16, 31,678.07 and 19,907.00 is: 29,817.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.16 : 31,678.07 = 19,907.00 : x
  2. Step 2: Convert to fraction form
    21,149.16/31,678.07 = 19,907.00/x
  3. Step 3: Cross multiply
    21,149.16x = 31,678.07 × 19,907.00
  4. Step 4: Simplify right side
    21,149.16x = 630,615,081.56
  5. Step 5: Solve for x
    x = 630,615,081.56/21,149.16
  6. Step 6: Final answer
    x = 29,817.50

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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.