Home / 15,528.96-21,430.08-8,455.50

Finding the Fourth Proportional to 15,528.96, 21,430.08 and 8,455.50

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Solution

The fourth proportional to 15,528.96, 21,430.08 and 8,455.50 is: 11,668.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.96 : 21,430.08 = 8,455.50 : x
  2. Step 2: Convert to fraction form
    15,528.96/21,430.08 = 8,455.50/x
  3. Step 3: Cross multiply
    15,528.96x = 21,430.08 × 8,455.50
  4. Step 4: Simplify right side
    15,528.96x = 181,202,041.44
  5. Step 5: Solve for x
    x = 181,202,041.44/15,528.96
  6. Step 6: Final answer
    x = 11,668.65

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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.