Home / 20,897.18-28,830.54-13,730.95

Finding the Fourth Proportional to 20,897.18, 28,830.54 and 13,730.95

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Solution

The fourth proportional to 20,897.18, 28,830.54 and 13,730.95 is: 18,943.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.18 : 28,830.54 = 13,730.95 : x
  2. Step 2: Convert to fraction form
    20,897.18/28,830.54 = 13,730.95/x
  3. Step 3: Cross multiply
    20,897.18x = 28,830.54 × 13,730.95
  4. Step 4: Simplify right side
    20,897.18x = 395,870,703.21
  5. Step 5: Solve for x
    x = 395,870,703.21/20,897.18
  6. Step 6: Final answer
    x = 18,943.74

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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.