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Finding the Fourth Proportional to 11,903.61, 16,407.93 and 9,381.54

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Solution

The fourth proportional to 11,903.61, 16,407.93 and 9,381.54 is: 12,931.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,903.61 : 16,407.93 = 9,381.54 : x
  2. Step 2: Convert to fraction form
    11,903.61/16,407.93 = 9,381.54/x
  3. Step 3: Cross multiply
    11,903.61x = 16,407.93 × 9,381.54
  4. Step 4: Simplify right side
    11,903.61x = 153,931,651.61
  5. Step 5: Solve for x
    x = 153,931,651.61/11,903.61
  6. Step 6: Final answer
    x = 12,931.51

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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.