Home / 21,281.13-31,936.27-7,430.13

Finding the Fourth Proportional to 21,281.13, 31,936.27 and 7,430.13

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Solution

The fourth proportional to 21,281.13, 31,936.27 and 7,430.13 is: 11,150.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.13 : 31,936.27 = 7,430.13 : x
  2. Step 2: Convert to fraction form
    21,281.13/31,936.27 = 7,430.13/x
  3. Step 3: Cross multiply
    21,281.13x = 31,936.27 × 7,430.13
  4. Step 4: Simplify right side
    21,281.13x = 237,290,637.82
  5. Step 5: Solve for x
    x = 237,290,637.82/21,281.13
  6. Step 6: Final answer
    x = 11,150.28

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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.