Home / 15,529.10-21,430.14-8,455.53

Finding the Fourth Proportional to 15,529.10, 21,430.14 and 8,455.53

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Solution

The fourth proportional to 15,529.10, 21,430.14 and 8,455.53 is: 11,668.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.10 : 21,430.14 = 8,455.53 : x
  2. Step 2: Convert to fraction form
    15,529.10/21,430.14 = 8,455.53/x
  3. Step 3: Cross multiply
    15,529.10x = 21,430.14 × 8,455.53
  4. Step 4: Simplify right side
    15,529.10x = 181,203,191.67
  5. Step 5: Solve for x
    x = 181,203,191.67/15,529.10
  6. Step 6: Final answer
    x = 11,668.62

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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.