Home / 21,458.41-29,602.07-18,621.80

Finding the Fourth Proportional to 21,458.41, 29,602.07 and 18,621.80

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Solution

The fourth proportional to 21,458.41, 29,602.07 and 18,621.80 is: 25,688.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,458.41 : 29,602.07 = 18,621.80 : x
  2. Step 2: Convert to fraction form
    21,458.41/29,602.07 = 18,621.80/x
  3. Step 3: Cross multiply
    21,458.41x = 29,602.07 × 18,621.80
  4. Step 4: Simplify right side
    21,458.41x = 551,243,827.13
  5. Step 5: Solve for x
    x = 551,243,827.13/21,458.41
  6. Step 6: Final answer
    x = 25,688.94

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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.