Home / 20,663.51-28,518.06-12,280.01

Finding the Fourth Proportional to 20,663.51, 28,518.06 and 12,280.01

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Solution

The fourth proportional to 20,663.51, 28,518.06 and 12,280.01 is: 16,947.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.51 : 28,518.06 = 12,280.01 : x
  2. Step 2: Convert to fraction form
    20,663.51/28,518.06 = 12,280.01/x
  3. Step 3: Cross multiply
    20,663.51x = 28,518.06 × 12,280.01
  4. Step 4: Simplify right side
    20,663.51x = 350,201,919.39
  5. Step 5: Solve for x
    x = 350,201,919.39/20,663.51
  6. Step 6: Final answer
    x = 16,947.85

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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.