Home / 9,916.20-13,681.58-6,381.47

Finding the Fourth Proportional to 9,916.20, 13,681.58 and 6,381.47

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Solution

The fourth proportional to 9,916.20, 13,681.58 and 6,381.47 is: 8,804.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,916.20 : 13,681.58 = 6,381.47 : x
  2. Step 2: Convert to fraction form
    9,916.20/13,681.58 = 6,381.47/x
  3. Step 3: Cross multiply
    9,916.20x = 13,681.58 × 6,381.47
  4. Step 4: Simplify right side
    9,916.20x = 87,308,492.01
  5. Step 5: Solve for x
    x = 87,308,492.01/9,916.20
  6. Step 6: Final answer
    x = 8,804.63

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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.