Home / 28,130.28-38,818.74-15,555.24

Finding the Fourth Proportional to 28,130.28, 38,818.74 and 15,555.24

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Solution

The fourth proportional to 28,130.28, 38,818.74 and 15,555.24 is: 21,465.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.28 : 38,818.74 = 15,555.24 : x
  2. Step 2: Convert to fraction form
    28,130.28/38,818.74 = 15,555.24/x
  3. Step 3: Cross multiply
    28,130.28x = 38,818.74 × 15,555.24
  4. Step 4: Simplify right side
    28,130.28x = 603,834,817.20
  5. Step 5: Solve for x
    x = 603,834,817.20/28,130.28
  6. Step 6: Final answer
    x = 21,465.65

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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.