Home / 15,315.68-21,136.04-8,601.84

Finding the Fourth Proportional to 15,315.68, 21,136.04 and 8,601.84

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Solution

The fourth proportional to 15,315.68, 21,136.04 and 8,601.84 is: 11,870.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.68 : 21,136.04 = 8,601.84 : x
  2. Step 2: Convert to fraction form
    15,315.68/21,136.04 = 8,601.84/x
  3. Step 3: Cross multiply
    15,315.68x = 21,136.04 × 8,601.84
  4. Step 4: Simplify right side
    15,315.68x = 181,808,834.31
  5. Step 5: Solve for x
    x = 181,808,834.31/15,315.68
  6. Step 6: Final answer
    x = 11,870.76

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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.