Home / 21,090.69-31,682.16-15,579.45

Finding the Fourth Proportional to 21,090.69, 31,682.16 and 15,579.45

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Solution

The fourth proportional to 21,090.69, 31,682.16 and 15,579.45 is: 23,403.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.69 : 31,682.16 = 15,579.45 : x
  2. Step 2: Convert to fraction form
    21,090.69/31,682.16 = 15,579.45/x
  3. Step 3: Cross multiply
    21,090.69x = 31,682.16 × 15,579.45
  4. Step 4: Simplify right side
    21,090.69x = 493,590,627.61
  5. Step 5: Solve for x
    x = 493,590,627.61/21,090.69
  6. Step 6: Final answer
    x = 23,403.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.