Home / 20,712.99-28,587.63-12,214.60

Finding the Fourth Proportional to 20,712.99, 28,587.63 and 12,214.60

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Solution

The fourth proportional to 20,712.99, 28,587.63 and 12,214.60 is: 16,858.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.99 : 28,587.63 = 12,214.60 : x
  2. Step 2: Convert to fraction form
    20,712.99/28,587.63 = 12,214.60/x
  3. Step 3: Cross multiply
    20,712.99x = 28,587.63 × 12,214.60
  4. Step 4: Simplify right side
    20,712.99x = 349,186,465.40
  5. Step 5: Solve for x
    x = 349,186,465.40/20,712.99
  6. Step 6: Final answer
    x = 16,858.33

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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.