Home / 15,530.08-21,430.80-8,455.84

Finding the Fourth Proportional to 15,530.08, 21,430.80 and 8,455.84

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Solution

The fourth proportional to 15,530.08, 21,430.80 and 8,455.84 is: 11,668.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,530.08 : 21,430.80 = 8,455.84 : x
  2. Step 2: Convert to fraction form
    15,530.08/21,430.80 = 8,455.84/x
  3. Step 3: Cross multiply
    15,530.08x = 21,430.80 × 8,455.84
  4. Step 4: Simplify right side
    15,530.08x = 181,215,415.87
  5. Step 5: Solve for x
    x = 181,215,415.87/15,530.08
  6. Step 6: Final answer
    x = 11,668.67

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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.