Home / 13,356.02-18,431.63-7,387.80

Finding the Fourth Proportional to 13,356.02, 18,431.63 and 7,387.80

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Solution

The fourth proportional to 13,356.02, 18,431.63 and 7,387.80 is: 10,195.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.02 : 18,431.63 = 7,387.80 : x
  2. Step 2: Convert to fraction form
    13,356.02/18,431.63 = 7,387.80/x
  3. Step 3: Cross multiply
    13,356.02x = 18,431.63 × 7,387.80
  4. Step 4: Simplify right side
    13,356.02x = 136,169,159.18
  5. Step 5: Solve for x
    x = 136,169,159.18/13,356.02
  6. Step 6: Final answer
    x = 10,195.34

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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.