Home / 27,890.92-38,490.15-15,315.67

Finding the Fourth Proportional to 27,890.92, 38,490.15 and 15,315.67

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Solution

The fourth proportional to 27,890.92, 38,490.15 and 15,315.67 is: 21,136.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,890.92 : 38,490.15 = 15,315.67 : x
  2. Step 2: Convert to fraction form
    27,890.92/38,490.15 = 15,315.67/x
  3. Step 3: Cross multiply
    27,890.92x = 38,490.15 × 15,315.67
  4. Step 4: Simplify right side
    27,890.92x = 589,502,435.65
  5. Step 5: Solve for x
    x = 589,502,435.65/27,890.92
  6. Step 6: Final answer
    x = 21,136.00

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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.