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Finding the Fourth Proportional to 15,569.83, 21,486.99 and 8,856.64

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Solution

The fourth proportional to 15,569.83, 21,486.99 and 8,856.64 is: 12,222.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,569.83 : 21,486.99 = 8,856.64 : x
  2. Step 2: Convert to fraction form
    15,569.83/21,486.99 = 8,856.64/x
  3. Step 3: Cross multiply
    15,569.83x = 21,486.99 × 8,856.64
  4. Step 4: Simplify right side
    15,569.83x = 190,302,535.11
  5. Step 5: Solve for x
    x = 190,302,535.11/15,569.83
  6. Step 6: Final answer
    x = 12,222.52

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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.