Home / 15,320.79-21,150.75-10,311.35

Finding the Fourth Proportional to 15,320.79, 21,150.75 and 10,311.35

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Solution

The fourth proportional to 15,320.79, 21,150.75 and 10,311.35 is: 14,235.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.79 : 21,150.75 = 10,311.35 : x
  2. Step 2: Convert to fraction form
    15,320.79/21,150.75 = 10,311.35/x
  3. Step 3: Cross multiply
    15,320.79x = 21,150.75 × 10,311.35
  4. Step 4: Simplify right side
    15,320.79x = 218,092,680.26
  5. Step 5: Solve for x
    x = 218,092,680.26/15,320.79
  6. Step 6: Final answer
    x = 14,235.08

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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.