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Finding the Fourth Proportional to 15,136.60, 20,885.12 and 9,168.16

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Solution

The fourth proportional to 15,136.60, 20,885.12 and 9,168.16 is: 12,650.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,136.60 : 20,885.12 = 9,168.16 : x
  2. Step 2: Convert to fraction form
    15,136.60/20,885.12 = 9,168.16/x
  3. Step 3: Cross multiply
    15,136.60x = 20,885.12 × 9,168.16
  4. Step 4: Simplify right side
    15,136.60x = 191,478,075.94
  5. Step 5: Solve for x
    x = 191,478,075.94/15,136.60
  6. Step 6: Final answer
    x = 12,650.01

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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.