Home / 28,090.68-38,765.12-15,515.43

Finding the Fourth Proportional to 28,090.68, 38,765.12 and 15,515.43

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Solution

The fourth proportional to 28,090.68, 38,765.12 and 15,515.43 is: 21,411.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,090.68 : 38,765.12 = 15,515.43 : x
  2. Step 2: Convert to fraction form
    28,090.68/38,765.12 = 15,515.43/x
  3. Step 3: Cross multiply
    28,090.68x = 38,765.12 × 15,515.43
  4. Step 4: Simplify right side
    28,090.68x = 601,457,428.22
  5. Step 5: Solve for x
    x = 601,457,428.22/28,090.68
  6. Step 6: Final answer
    x = 21,411.28

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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.