Home / 21,528.96-29,638.08-20,538.24

Finding the Fourth Proportional to 21,528.96, 29,638.08 and 20,538.24

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Solution

The fourth proportional to 21,528.96, 29,638.08 and 20,538.24 is: 28,274.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,528.96 : 29,638.08 = 20,538.24 : x
  2. Step 2: Convert to fraction form
    21,528.96/29,638.08 = 20,538.24/x
  3. Step 3: Cross multiply
    21,528.96x = 29,638.08 × 20,538.24
  4. Step 4: Simplify right side
    21,528.96x = 608,714,000.18
  5. Step 5: Solve for x
    x = 608,714,000.18/21,528.96
  6. Step 6: Final answer
    x = 28,274.19

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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.