Home / 28,054.31-38,715.76-15,479.87

Finding the Fourth Proportional to 28,054.31, 38,715.76 and 15,479.87

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Solution

The fourth proportional to 28,054.31, 38,715.76 and 15,479.87 is: 21,362.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,054.31 : 38,715.76 = 15,479.87 : x
  2. Step 2: Convert to fraction form
    28,054.31/38,715.76 = 15,479.87/x
  3. Step 3: Cross multiply
    28,054.31x = 38,715.76 × 15,479.87
  4. Step 4: Simplify right side
    28,054.31x = 599,315,047.89
  5. Step 5: Solve for x
    x = 599,315,047.89/28,054.31
  6. Step 6: Final answer
    x = 21,362.67

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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.