Home / 20,981.73-28,955.70-12,030.09

Finding the Fourth Proportional to 20,981.73, 28,955.70 and 12,030.09

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Solution

The fourth proportional to 20,981.73, 28,955.70 and 12,030.09 is: 16,602.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.73 : 28,955.70 = 12,030.09 : x
  2. Step 2: Convert to fraction form
    20,981.73/28,955.70 = 12,030.09/x
  3. Step 3: Cross multiply
    20,981.73x = 28,955.70 × 12,030.09
  4. Step 4: Simplify right side
    20,981.73x = 348,339,677.01
  5. Step 5: Solve for x
    x = 348,339,677.01/20,981.73
  6. Step 6: Final answer
    x = 16,602.05

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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.