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Finding the Fourth Proportional to 21,837.20, 30,533.20 and 21,837.20

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Solution

The fourth proportional to 21,837.20, 30,533.20 and 21,837.20 is: 30,533.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,837.20 : 30,533.20 = 21,837.20 : x
  2. Step 2: Convert to fraction form
    21,837.20/30,533.20 = 21,837.20/x
  3. Step 3: Cross multiply
    21,837.20x = 30,533.20 × 21,837.20
  4. Step 4: Simplify right side
    21,837.20x = 666,759,595.04
  5. Step 5: Solve for x
    x = 666,759,595.04/21,837.20
  6. Step 6: Final answer
    x = 30,533.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.