Home / 21,270.48-29,330.28-20,786.64

Finding the Fourth Proportional to 21,270.48, 29,330.28 and 20,786.64

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Solution

The fourth proportional to 21,270.48, 29,330.28 and 20,786.64 is: 28,663.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.48 : 29,330.28 = 20,786.64 : x
  2. Step 2: Convert to fraction form
    21,270.48/29,330.28 = 20,786.64/x
  3. Step 3: Cross multiply
    21,270.48x = 29,330.28 × 20,786.64
  4. Step 4: Simplify right side
    21,270.48x = 609,677,971.46
  5. Step 5: Solve for x
    x = 609,677,971.46/21,270.48
  6. Step 6: Final answer
    x = 28,663.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.