Home / 15,423.66-21,285.33-8,709.35

Finding the Fourth Proportional to 15,423.66, 21,285.33 and 8,709.35

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Solution

The fourth proportional to 15,423.66, 21,285.33 and 8,709.35 is: 12,019.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,423.66 : 21,285.33 = 8,709.35 : x
  2. Step 2: Convert to fraction form
    15,423.66/21,285.33 = 8,709.35/x
  3. Step 3: Cross multiply
    15,423.66x = 21,285.33 × 8,709.35
  4. Step 4: Simplify right side
    15,423.66x = 185,381,282.41
  5. Step 5: Solve for x
    x = 185,381,282.41/15,423.66
  6. Step 6: Final answer
    x = 12,019.28

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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.