Home / 20,465.86-28,237.70-15,690.58

Finding the Fourth Proportional to 20,465.86, 28,237.70 and 15,690.58

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Solution

The fourth proportional to 20,465.86, 28,237.70 and 15,690.58 is: 21,649.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,465.86 : 28,237.70 = 15,690.58 : x
  2. Step 2: Convert to fraction form
    20,465.86/28,237.70 = 15,690.58/x
  3. Step 3: Cross multiply
    20,465.86x = 28,237.70 × 15,690.58
  4. Step 4: Simplify right side
    20,465.86x = 443,065,890.87
  5. Step 5: Solve for x
    x = 443,065,890.87/20,465.86
  6. Step 6: Final answer
    x = 21,649.02

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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.