Home / 13,153.40-18,151.70-7,185.08

Finding the Fourth Proportional to 13,153.40, 18,151.70 and 7,185.08

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Solution

The fourth proportional to 13,153.40, 18,151.70 and 7,185.08 is: 9,915.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,153.40 : 18,151.70 = 7,185.08 : x
  2. Step 2: Convert to fraction form
    13,153.40/18,151.70 = 7,185.08/x
  3. Step 3: Cross multiply
    13,153.40x = 18,151.70 × 7,185.08
  4. Step 4: Simplify right side
    13,153.40x = 130,421,289.95
  5. Step 5: Solve for x
    x = 130,421,289.95/13,153.40
  6. Step 6: Final answer
    x = 9,915.41

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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.