Home / 15,811.36-21,756.72-15,330.40

Finding the Fourth Proportional to 15,811.36, 21,756.72 and 15,330.40

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Solution

The fourth proportional to 15,811.36, 21,756.72 and 15,330.40 is: 21,094.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.36 : 21,756.72 = 15,330.40 : x
  2. Step 2: Convert to fraction form
    15,811.36/21,756.72 = 15,330.40/x
  3. Step 3: Cross multiply
    15,811.36x = 21,756.72 × 15,330.40
  4. Step 4: Simplify right side
    15,811.36x = 333,539,220.29
  5. Step 5: Solve for x
    x = 333,539,220.29/15,811.36
  6. Step 6: Final answer
    x = 21,094.91

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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.