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Finding the Fourth Proportional to 9,368.68, 12,929.16 and 5,389.80

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Solution

The fourth proportional to 9,368.68, 12,929.16 and 5,389.80 is: 7,438.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,368.68 : 12,929.16 = 5,389.80 : x
  2. Step 2: Convert to fraction form
    9,368.68/12,929.16 = 5,389.80/x
  3. Step 3: Cross multiply
    9,368.68x = 12,929.16 × 5,389.80
  4. Step 4: Simplify right side
    9,368.68x = 69,685,586.57
  5. Step 5: Solve for x
    x = 69,685,586.57/9,368.68
  6. Step 6: Final answer
    x = 7,438.14

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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.