Home / 15,370.90-21,073.57-15,090.69

Finding the Fourth Proportional to 15,370.90, 21,073.57 and 15,090.69

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Solution

The fourth proportional to 15,370.90, 21,073.57 and 15,090.69 is: 20,689.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,370.90 : 21,073.57 = 15,090.69 : x
  2. Step 2: Convert to fraction form
    15,370.90/21,073.57 = 15,090.69/x
  3. Step 3: Cross multiply
    15,370.90x = 21,073.57 × 15,090.69
  4. Step 4: Simplify right side
    15,370.90x = 318,014,712.06
  5. Step 5: Solve for x
    x = 318,014,712.06/15,370.90
  6. Step 6: Final answer
    x = 20,689.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.