Home / 15,130.40-20,878.56-11,153.70

Finding the Fourth Proportional to 15,130.40, 20,878.56 and 11,153.70

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Solution

The fourth proportional to 15,130.40, 20,878.56 and 11,153.70 is: 15,391.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,130.40 : 20,878.56 = 11,153.70 : x
  2. Step 2: Convert to fraction form
    15,130.40/20,878.56 = 11,153.70/x
  3. Step 3: Cross multiply
    15,130.40x = 20,878.56 × 11,153.70
  4. Step 4: Simplify right side
    15,130.40x = 232,873,194.67
  5. Step 5: Solve for x
    x = 232,873,194.67/15,130.40
  6. Step 6: Final answer
    x = 15,391.08

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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.