Home / 15,665.42-21,618.18-8,953.10

Finding the Fourth Proportional to 15,665.42, 21,618.18 and 8,953.10

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Solution

The fourth proportional to 15,665.42, 21,618.18 and 8,953.10 is: 12,355.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,665.42 : 21,618.18 = 8,953.10 : x
  2. Step 2: Convert to fraction form
    15,665.42/21,618.18 = 8,953.10/x
  3. Step 3: Cross multiply
    15,665.42x = 21,618.18 × 8,953.10
  4. Step 4: Simplify right side
    15,665.42x = 193,549,727.36
  5. Step 5: Solve for x
    x = 193,549,727.36/15,665.42
  6. Step 6: Final answer
    x = 12,355.22

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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.