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Finding the Fourth Proportional to 15,587.62, 21,509.88 and 8,873.94

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Solution

The fourth proportional to 15,587.62, 21,509.88 and 8,873.94 is: 12,245.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,587.62 : 21,509.88 = 8,873.94 : x
  2. Step 2: Convert to fraction form
    15,587.62/21,509.88 = 8,873.94/x
  3. Step 3: Cross multiply
    15,587.62x = 21,509.88 × 8,873.94
  4. Step 4: Simplify right side
    15,587.62x = 190,877,384.53
  5. Step 5: Solve for x
    x = 190,877,384.53/15,587.62
  6. Step 6: Final answer
    x = 12,245.45

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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.