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Finding the Fourth Proportional to 15,612.26, 21,547 and 8,807.67

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Solution

The fourth proportional to 15,612.26, 21,547 and 8,807.67 is: 12,155.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,612.26 : 21,547 = 8,807.67 : x
  2. Step 2: Convert to fraction form
    15,612.26/21,547 = 8,807.67/x
  3. Step 3: Cross multiply
    15,612.26x = 21,547 × 8,807.67
  4. Step 4: Simplify right side
    15,612.26x = 189,778,757.76
  5. Step 5: Solve for x
    x = 189,778,757.76/15,612.26
  6. Step 6: Final answer
    x = 12,155.75

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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.