Home / 15,312.85-21,135.33-9,028.87

Finding the Fourth Proportional to 15,312.85, 21,135.33 and 9,028.87

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Solution

The fourth proportional to 15,312.85, 21,135.33 and 9,028.87 is: 12,461.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,312.85 : 21,135.33 = 9,028.87 : x
  2. Step 2: Convert to fraction form
    15,312.85/21,135.33 = 9,028.87/x
  3. Step 3: Cross multiply
    15,312.85x = 21,135.33 × 9,028.87
  4. Step 4: Simplify right side
    15,312.85x = 190,828,094.14
  5. Step 5: Solve for x
    x = 190,828,094.14/15,312.85
  6. Step 6: Final answer
    x = 12,461.96

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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.