Home / 15,430.56-21,290.64-8,715.52

Finding the Fourth Proportional to 15,430.56, 21,290.64 and 8,715.52

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Solution

The fourth proportional to 15,430.56, 21,290.64 and 8,715.52 is: 12,025.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.56 : 21,290.64 = 8,715.52 : x
  2. Step 2: Convert to fraction form
    15,430.56/21,290.64 = 8,715.52/x
  3. Step 3: Cross multiply
    15,430.56x = 21,290.64 × 8,715.52
  4. Step 4: Simplify right side
    15,430.56x = 185,558,998.73
  5. Step 5: Solve for x
    x = 185,558,998.73/15,430.56
  6. Step 6: Final answer
    x = 12,025.42

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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.