Home / 28,312.30-39,070.74-15,391.46

Finding the Fourth Proportional to 28,312.30, 39,070.74 and 15,391.46

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Solution

The fourth proportional to 28,312.30, 39,070.74 and 15,391.46 is: 21,240.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,312.30 : 39,070.74 = 15,391.46 : x
  2. Step 2: Convert to fraction form
    28,312.30/39,070.74 = 15,391.46/x
  3. Step 3: Cross multiply
    28,312.30x = 39,070.74 × 15,391.46
  4. Step 4: Simplify right side
    28,312.30x = 601,355,731.88
  5. Step 5: Solve for x
    x = 601,355,731.88/28,312.30
  6. Step 6: Final answer
    x = 21,240.09

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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.