Home / 15,605.20-21,539.40-9,320.40

Finding the Fourth Proportional to 15,605.20, 21,539.40 and 9,320.40

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Solution

The fourth proportional to 15,605.20, 21,539.40 and 9,320.40 is: 12,864.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,605.20 : 21,539.40 = 9,320.40 : x
  2. Step 2: Convert to fraction form
    15,605.20/21,539.40 = 9,320.40/x
  3. Step 3: Cross multiply
    15,605.20x = 21,539.40 × 9,320.40
  4. Step 4: Simplify right side
    15,605.20x = 200,755,823.76
  5. Step 5: Solve for x
    x = 200,755,823.76/15,605.20
  6. Step 6: Final answer
    x = 12,864.67

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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.