Home / 15,785.68-21,783.39-9,817.18

Finding the Fourth Proportional to 15,785.68, 21,783.39 and 9,817.18

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Solution

The fourth proportional to 15,785.68, 21,783.39 and 9,817.18 is: 13,547.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,785.68 : 21,783.39 = 9,817.18 : x
  2. Step 2: Convert to fraction form
    15,785.68/21,783.39 = 9,817.18/x
  3. Step 3: Cross multiply
    15,785.68x = 21,783.39 × 9,817.18
  4. Step 4: Simplify right side
    15,785.68x = 213,851,460.64
  5. Step 5: Solve for x
    x = 213,851,460.64/15,785.68
  6. Step 6: Final answer
    x = 13,547.18

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Double scale
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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.