Home / 21,008.40-28,983.96-12,513.12

Finding the Fourth Proportional to 21,008.40, 28,983.96 and 12,513.12

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Solution

The fourth proportional to 21,008.40, 28,983.96 and 12,513.12 is: 17,263.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.40 : 28,983.96 = 12,513.12 : x
  2. Step 2: Convert to fraction form
    21,008.40/28,983.96 = 12,513.12/x
  3. Step 3: Cross multiply
    21,008.40x = 28,983.96 × 12,513.12
  4. Step 4: Simplify right side
    21,008.40x = 362,679,769.56
  5. Step 5: Solve for x
    x = 362,679,769.56/21,008.40
  6. Step 6: Final answer
    x = 17,263.56

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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.