Home / 21,430.14-32,143.40-7,388.80

Finding the Fourth Proportional to 21,430.14, 32,143.40 and 7,388.80

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Solution

The fourth proportional to 21,430.14, 32,143.40 and 7,388.80 is: 11,082.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.14 : 32,143.40 = 7,388.80 : x
  2. Step 2: Convert to fraction form
    21,430.14/32,143.40 = 7,388.80/x
  3. Step 3: Cross multiply
    21,430.14x = 32,143.40 × 7,388.80
  4. Step 4: Simplify right side
    21,430.14x = 237,501,153.92
  5. Step 5: Solve for x
    x = 237,501,153.92/21,430.14
  6. Step 6: Final answer
    x = 11,082.58

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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.