Home / 15,611.79-21,543.93-8,538.20

Finding the Fourth Proportional to 15,611.79, 21,543.93 and 8,538.20

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Solution

The fourth proportional to 15,611.79, 21,543.93 and 8,538.20 is: 11,782.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,611.79 : 21,543.93 = 8,538.20 : x
  2. Step 2: Convert to fraction form
    15,611.79/21,543.93 = 8,538.20/x
  3. Step 3: Cross multiply
    15,611.79x = 21,543.93 × 8,538.20
  4. Step 4: Simplify right side
    15,611.79x = 183,946,383.13
  5. Step 5: Solve for x
    x = 183,946,383.13/15,611.79
  6. Step 6: Final answer
    x = 11,782.53

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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.