Home / 15,123.02-20,870.30-8,410.55

Finding the Fourth Proportional to 15,123.02, 20,870.30 and 8,410.55

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Solution

The fourth proportional to 15,123.02, 20,870.30 and 8,410.55 is: 11,606.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,123.02 : 20,870.30 = 8,410.55 : x
  2. Step 2: Convert to fraction form
    15,123.02/20,870.30 = 8,410.55/x
  3. Step 3: Cross multiply
    15,123.02x = 20,870.30 × 8,410.55
  4. Step 4: Simplify right side
    15,123.02x = 175,530,701.67
  5. Step 5: Solve for x
    x = 175,530,701.67/15,123.02
  6. Step 6: Final answer
    x = 11,606.86

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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.