Home / 28,138.55-42,228.57-13,347.51

Finding the Fourth Proportional to 28,138.55, 42,228.57 and 13,347.51

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Solution

The fourth proportional to 28,138.55, 42,228.57 and 13,347.51 is: 20,031.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,138.55 : 42,228.57 = 13,347.51 : x
  2. Step 2: Convert to fraction form
    28,138.55/42,228.57 = 13,347.51/x
  3. Step 3: Cross multiply
    28,138.55x = 42,228.57 × 13,347.51
  4. Step 4: Simplify right side
    28,138.55x = 563,646,260.36
  5. Step 5: Solve for x
    x = 563,646,260.36/28,138.55
  6. Step 6: Final answer
    x = 20,031.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.