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Finding the Fourth Proportional to 15,607.70, 21,538.59 and 8,534.11

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Solution

The fourth proportional to 15,607.70, 21,538.59 and 8,534.11 is: 11,777.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,607.70 : 21,538.59 = 8,534.11 : x
  2. Step 2: Convert to fraction form
    15,607.70/21,538.59 = 8,534.11/x
  3. Step 3: Cross multiply
    15,607.70x = 21,538.59 × 8,534.11
  4. Step 4: Simplify right side
    15,607.70x = 183,812,696.30
  5. Step 5: Solve for x
    x = 183,812,696.30/15,607.70
  6. Step 6: Final answer
    x = 11,777.05

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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.