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Finding the Fourth Proportional to 8,307.93, 12,421.80 and 8,111.10

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Solution

The fourth proportional to 8,307.93, 12,421.80 and 8,111.10 is: 12,127.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,307.93 : 12,421.80 = 8,111.10 : x
  2. Step 2: Convert to fraction form
    8,307.93/12,421.80 = 8,111.10/x
  3. Step 3: Cross multiply
    8,307.93x = 12,421.80 × 8,111.10
  4. Step 4: Simplify right side
    8,307.93x = 100,754,461.98
  5. Step 5: Solve for x
    x = 100,754,461.98/8,307.93
  6. Step 6: Final answer
    x = 12,127.50

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.