Home / 15,529.38-21,430.33-8,455.81

Finding the Fourth Proportional to 15,529.38, 21,430.33 and 8,455.81

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Solution

The fourth proportional to 15,529.38, 21,430.33 and 8,455.81 is: 11,668.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.38 : 21,430.33 = 8,455.81 : x
  2. Step 2: Convert to fraction form
    15,529.38/21,430.33 = 8,455.81/x
  3. Step 3: Cross multiply
    15,529.38x = 21,430.33 × 8,455.81
  4. Step 4: Simplify right side
    15,529.38x = 181,210,798.72
  5. Step 5: Solve for x
    x = 181,210,798.72/15,529.38
  6. Step 6: Final answer
    x = 11,668.90

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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.