Home / 15,316.17-21,135.78-9,357.81

Finding the Fourth Proportional to 15,316.17, 21,135.78 and 9,357.81

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Solution

The fourth proportional to 15,316.17, 21,135.78 and 9,357.81 is: 12,913.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,316.17 : 21,135.78 = 9,357.81 : x
  2. Step 2: Convert to fraction form
    15,316.17/21,135.78 = 9,357.81/x
  3. Step 3: Cross multiply
    15,316.17x = 21,135.78 × 9,357.81
  4. Step 4: Simplify right side
    15,316.17x = 197,784,613.44
  5. Step 5: Solve for x
    x = 197,784,613.44/15,316.17
  6. Step 6: Final answer
    x = 12,913.45

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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.