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Finding the Fourth Proportional to 14,915.98, 20,582.40 and 8,947.90

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Solution

The fourth proportional to 14,915.98, 20,582.40 and 8,947.90 is: 12,347.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,915.98 : 20,582.40 = 8,947.90 : x
  2. Step 2: Convert to fraction form
    14,915.98/20,582.40 = 8,947.90/x
  3. Step 3: Cross multiply
    14,915.98x = 20,582.40 × 8,947.90
  4. Step 4: Simplify right side
    14,915.98x = 184,169,256.96
  5. Step 5: Solve for x
    x = 184,169,256.96/14,915.98
  6. Step 6: Final answer
    x = 12,347.11

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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.