Home / 15,615.02-21,548.40-8,541.20

Finding the Fourth Proportional to 15,615.02, 21,548.40 and 8,541.20

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Solution

The fourth proportional to 15,615.02, 21,548.40 and 8,541.20 is: 11,786.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,615.02 : 21,548.40 = 8,541.20 : x
  2. Step 2: Convert to fraction form
    15,615.02/21,548.40 = 8,541.20/x
  3. Step 3: Cross multiply
    15,615.02x = 21,548.40 × 8,541.20
  4. Step 4: Simplify right side
    15,615.02x = 184,049,194.08
  5. Step 5: Solve for x
    x = 184,049,194.08/15,615.02
  6. Step 6: Final answer
    x = 11,786.68

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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.