Home / 28,488.02-39,315.76-15,742.32

Finding the Fourth Proportional to 28,488.02, 39,315.76 and 15,742.32

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Solution

The fourth proportional to 28,488.02, 39,315.76 and 15,742.32 is: 21,725.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,488.02 : 39,315.76 = 15,742.32 : x
  2. Step 2: Convert to fraction form
    28,488.02/39,315.76 = 15,742.32/x
  3. Step 3: Cross multiply
    28,488.02x = 39,315.76 × 15,742.32
  4. Step 4: Simplify right side
    28,488.02x = 618,921,274.96
  5. Step 5: Solve for x
    x = 618,921,274.96/28,488.02
  6. Step 6: Final answer
    x = 21,725.67

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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.