Home / 10,421.78-15,632.64-9,813.08

Finding the Fourth Proportional to 10,421.78, 15,632.64 and 9,813.08

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Solution

The fourth proportional to 10,421.78, 15,632.64 and 9,813.08 is: 14,719.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.78 : 15,632.64 = 9,813.08 : x
  2. Step 2: Convert to fraction form
    10,421.78/15,632.64 = 9,813.08/x
  3. Step 3: Cross multiply
    10,421.78x = 15,632.64 × 9,813.08
  4. Step 4: Simplify right side
    10,421.78x = 153,404,346.93
  5. Step 5: Solve for x
    x = 153,404,346.93/10,421.78
  6. Step 6: Final answer
    x = 14,719.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.