Home / 20,740.48-28,602.96-13,664.32

Finding the Fourth Proportional to 20,740.48, 28,602.96 and 13,664.32

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Solution

The fourth proportional to 20,740.48, 28,602.96 and 13,664.32 is: 18,844.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.48 : 28,602.96 = 13,664.32 : x
  2. Step 2: Convert to fraction form
    20,740.48/28,602.96 = 13,664.32/x
  3. Step 3: Cross multiply
    20,740.48x = 28,602.96 × 13,664.32
  4. Step 4: Simplify right side
    20,740.48x = 390,839,998.39
  5. Step 5: Solve for x
    x = 390,839,998.39/20,740.48
  6. Step 6: Final answer
    x = 18,844.31

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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.