Home / 38,686.68-53,389.86-21,690.08

Finding the Fourth Proportional to 38,686.68, 53,389.86 and 21,690.08

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Solution

The fourth proportional to 38,686.68, 53,389.86 and 21,690.08 is: 29,933.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,686.68 : 53,389.86 = 21,690.08 : x
  2. Step 2: Convert to fraction form
    38,686.68/53,389.86 = 21,690.08/x
  3. Step 3: Cross multiply
    38,686.68x = 53,389.86 × 21,690.08
  4. Step 4: Simplify right side
    38,686.68x = 1,158,030,334.59
  5. Step 5: Solve for x
    x = 1,158,030,334.59/38,686.68
  6. Step 6: Final answer
    x = 29,933.57

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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.