Home / 28,186.95-38,898.47-15,439.95

Finding the Fourth Proportional to 28,186.95, 38,898.47 and 15,439.95

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Solution

The fourth proportional to 28,186.95, 38,898.47 and 15,439.95 is: 21,307.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,186.95 : 38,898.47 = 15,439.95 : x
  2. Step 2: Convert to fraction form
    28,186.95/38,898.47 = 15,439.95/x
  3. Step 3: Cross multiply
    28,186.95x = 38,898.47 × 15,439.95
  4. Step 4: Simplify right side
    28,186.95x = 600,590,354.68
  5. Step 5: Solve for x
    x = 600,590,354.68/28,186.95
  6. Step 6: Final answer
    x = 21,307.39

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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.