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Finding the Fourth Proportional to 13,153.84, 18,152.40 and 7,185.40

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Solution

The fourth proportional to 13,153.84, 18,152.40 and 7,185.40 is: 9,915.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,153.84 : 18,152.40 = 7,185.40 : x
  2. Step 2: Convert to fraction form
    13,153.84/18,152.40 = 7,185.40/x
  3. Step 3: Cross multiply
    13,153.84x = 18,152.40 × 7,185.40
  4. Step 4: Simplify right side
    13,153.84x = 130,432,254.96
  5. Step 5: Solve for x
    x = 130,432,254.96/13,153.84
  6. Step 6: Final answer
    x = 9,915.91

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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.