Home / 20,897.40-28,838.87-11,465.98

Finding the Fourth Proportional to 20,897.40, 28,838.87 and 11,465.98

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Solution

The fourth proportional to 20,897.40, 28,838.87 and 11,465.98 is: 15,823.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.40 : 28,838.87 = 11,465.98 : x
  2. Step 2: Convert to fraction form
    20,897.40/28,838.87 = 11,465.98/x
  3. Step 3: Cross multiply
    20,897.40x = 28,838.87 × 11,465.98
  4. Step 4: Simplify right side
    20,897.40x = 330,665,906.64
  5. Step 5: Solve for x
    x = 330,665,906.64/20,897.40
  6. Step 6: Final answer
    x = 15,823.30

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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.