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Finding the Fourth Proportional to 15,655.40, 21,604.40 and 8,485.53

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Solution

The fourth proportional to 15,655.40, 21,604.40 and 8,485.53 is: 11,710.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,655.40 : 21,604.40 = 8,485.53 : x
  2. Step 2: Convert to fraction form
    15,655.40/21,604.40 = 8,485.53/x
  3. Step 3: Cross multiply
    15,655.40x = 21,604.40 × 8,485.53
  4. Step 4: Simplify right side
    15,655.40x = 183,324,784.33
  5. Step 5: Solve for x
    x = 183,324,784.33/15,655.40
  6. Step 6: Final answer
    x = 11,710.00

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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.