Home / 20,565.09-28,389.69-13,015.08

Finding the Fourth Proportional to 20,565.09, 28,389.69 and 13,015.08

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Solution

The fourth proportional to 20,565.09, 28,389.69 and 13,015.08 is: 17,967.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.09 : 28,389.69 = 13,015.08 : x
  2. Step 2: Convert to fraction form
    20,565.09/28,389.69 = 13,015.08/x
  3. Step 3: Cross multiply
    20,565.09x = 28,389.69 × 13,015.08
  4. Step 4: Simplify right side
    20,565.09x = 369,494,086.53
  5. Step 5: Solve for x
    x = 369,494,086.53/20,565.09
  6. Step 6: Final answer
    x = 17,967.05

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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.