Home / 20,594.88-28,421.58-12,420.78

Finding the Fourth Proportional to 20,594.88, 28,421.58 and 12,420.78

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Solution

The fourth proportional to 20,594.88, 28,421.58 and 12,420.78 is: 17,141.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,594.88 : 28,421.58 = 12,420.78 : x
  2. Step 2: Convert to fraction form
    20,594.88/28,421.58 = 12,420.78/x
  3. Step 3: Cross multiply
    20,594.88x = 28,421.58 × 12,420.78
  4. Step 4: Simplify right side
    20,594.88x = 353,018,192.43
  5. Step 5: Solve for x
    x = 353,018,192.43/20,594.88
  6. Step 6: Final answer
    x = 17,141.07

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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.