Home / 15,378.21-21,225.90-10,014.05

Finding the Fourth Proportional to 15,378.21, 21,225.90 and 10,014.05

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Solution

The fourth proportional to 15,378.21, 21,225.90 and 10,014.05 is: 13,821.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,378.21 : 21,225.90 = 10,014.05 : x
  2. Step 2: Convert to fraction form
    15,378.21/21,225.90 = 10,014.05/x
  3. Step 3: Cross multiply
    15,378.21x = 21,225.90 × 10,014.05
  4. Step 4: Simplify right side
    15,378.21x = 212,557,117.77
  5. Step 5: Solve for x
    x = 212,557,117.77/15,378.21
  6. Step 6: Final answer
    x = 13,821.97

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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.