Home / 18,373.86-25,356.51-9,990.36

Finding the Fourth Proportional to 18,373.86, 25,356.51 and 9,990.36

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Solution

The fourth proportional to 18,373.86, 25,356.51 and 9,990.36 is: 13,787.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,373.86 : 25,356.51 = 9,990.36 : x
  2. Step 2: Convert to fraction form
    18,373.86/25,356.51 = 9,990.36/x
  3. Step 3: Cross multiply
    18,373.86x = 25,356.51 × 9,990.36
  4. Step 4: Simplify right side
    18,373.86x = 253,320,663.24
  5. Step 5: Solve for x
    x = 253,320,663.24/18,373.86
  6. Step 6: Final answer
    x = 13,787.01

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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.