Home / 15,529.49-21,430.61-8,455.90

Finding the Fourth Proportional to 15,529.49, 21,430.61 and 8,455.90

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Solution

The fourth proportional to 15,529.49, 21,430.61 and 8,455.90 is: 11,669.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.49 : 21,430.61 = 8,455.90 : x
  2. Step 2: Convert to fraction form
    15,529.49/21,430.61 = 8,455.90/x
  3. Step 3: Cross multiply
    15,529.49x = 21,430.61 × 8,455.90
  4. Step 4: Simplify right side
    15,529.49x = 181,215,030.95
  5. Step 5: Solve for x
    x = 181,215,030.95/15,529.49
  6. Step 6: Final answer
    x = 11,669.09

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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.