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Finding the Fourth Proportional to 10,681.72, 14,742.15 and 6,434.99

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Solution

The fourth proportional to 10,681.72, 14,742.15 and 6,434.99 is: 8,881.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,681.72 : 14,742.15 = 6,434.99 : x
  2. Step 2: Convert to fraction form
    10,681.72/14,742.15 = 6,434.99/x
  3. Step 3: Cross multiply
    10,681.72x = 14,742.15 × 6,434.99
  4. Step 4: Simplify right side
    10,681.72x = 94,865,664.39
  5. Step 5: Solve for x
    x = 94,865,664.39/10,681.72
  6. Step 6: Final answer
    x = 8,881.12

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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.