Home / 20,405.49-28,152.34-13,336.01

Finding the Fourth Proportional to 20,405.49, 28,152.34 and 13,336.01

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Solution

The fourth proportional to 20,405.49, 28,152.34 and 13,336.01 is: 18,398.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.49 : 28,152.34 = 13,336.01 : x
  2. Step 2: Convert to fraction form
    20,405.49/28,152.34 = 13,336.01/x
  3. Step 3: Cross multiply
    20,405.49x = 28,152.34 × 13,336.01
  4. Step 4: Simplify right side
    20,405.49x = 375,439,887.76
  5. Step 5: Solve for x
    x = 375,439,887.76/20,405.49
  6. Step 6: Final answer
    x = 18,398.96

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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.