Home / 15,529.47-21,430.58-8,455.83

Finding the Fourth Proportional to 15,529.47, 21,430.58 and 8,455.83

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Solution

The fourth proportional to 15,529.47, 21,430.58 and 8,455.83 is: 11,668.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.47 : 21,430.58 = 8,455.83 : x
  2. Step 2: Convert to fraction form
    15,529.47/21,430.58 = 8,455.83/x
  3. Step 3: Cross multiply
    15,529.47x = 21,430.58 × 8,455.83
  4. Step 4: Simplify right side
    15,529.47x = 181,213,299.00
  5. Step 5: Solve for x
    x = 181,213,299.00/15,529.47
  6. Step 6: Final answer
    x = 11,668.99

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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.