Home / 20,547.68-28,356.36-12,164.18

Finding the Fourth Proportional to 20,547.68, 28,356.36 and 12,164.18

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Solution

The fourth proportional to 20,547.68, 28,356.36 and 12,164.18 is: 16,786.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.68 : 28,356.36 = 12,164.18 : x
  2. Step 2: Convert to fraction form
    20,547.68/28,356.36 = 12,164.18/x
  3. Step 3: Cross multiply
    20,547.68x = 28,356.36 × 12,164.18
  4. Step 4: Simplify right side
    20,547.68x = 344,931,867.18
  5. Step 5: Solve for x
    x = 344,931,867.18/20,547.68
  6. Step 6: Final answer
    x = 16,786.90

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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.