Home / 13,685.43-18,860.08-9,902.19

Finding the Fourth Proportional to 13,685.43, 18,860.08 and 9,902.19

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Solution

The fourth proportional to 13,685.43, 18,860.08 and 9,902.19 is: 13,646.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.43 : 18,860.08 = 9,902.19 : x
  2. Step 2: Convert to fraction form
    13,685.43/18,860.08 = 9,902.19/x
  3. Step 3: Cross multiply
    13,685.43x = 18,860.08 × 9,902.19
  4. Step 4: Simplify right side
    13,685.43x = 186,756,001.27
  5. Step 5: Solve for x
    x = 186,756,001.27/13,685.43
  6. Step 6: Final answer
    x = 13,646.34

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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.