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Finding the Fourth Proportional to 15,653.86, 21,602.85 and 8,580.28

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Solution

The fourth proportional to 15,653.86, 21,602.85 and 8,580.28 is: 11,841.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,653.86 : 21,602.85 = 8,580.28 : x
  2. Step 2: Convert to fraction form
    15,653.86/21,602.85 = 8,580.28/x
  3. Step 3: Cross multiply
    15,653.86x = 21,602.85 × 8,580.28
  4. Step 4: Simplify right side
    15,653.86x = 185,358,501.80
  5. Step 5: Solve for x
    x = 185,358,501.80/15,653.86
  6. Step 6: Final answer
    x = 11,841.07

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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.