Home / 15,505.95-21,398.28-8,432.34

Finding the Fourth Proportional to 15,505.95, 21,398.28 and 8,432.34

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Solution

The fourth proportional to 15,505.95, 21,398.28 and 8,432.34 is: 11,636.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.95 : 21,398.28 = 8,432.34 : x
  2. Step 2: Convert to fraction form
    15,505.95/21,398.28 = 8,432.34/x
  3. Step 3: Cross multiply
    15,505.95x = 21,398.28 × 8,432.34
  4. Step 4: Simplify right side
    15,505.95x = 180,437,572.38
  5. Step 5: Solve for x
    x = 180,437,572.38/15,505.95
  6. Step 6: Final answer
    x = 11,636.67

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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.