Home / 9,420.54-12,998.88-5,386.65

Finding the Fourth Proportional to 9,420.54, 12,998.88 and 5,386.65

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Solution

The fourth proportional to 9,420.54, 12,998.88 and 5,386.65 is: 7,432.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,420.54 : 12,998.88 = 5,386.65 : x
  2. Step 2: Convert to fraction form
    9,420.54/12,998.88 = 5,386.65/x
  3. Step 3: Cross multiply
    9,420.54x = 12,998.88 × 5,386.65
  4. Step 4: Simplify right side
    9,420.54x = 70,020,416.95
  5. Step 5: Solve for x
    x = 70,020,416.95/9,420.54
  6. Step 6: Final answer
    x = 7,432.74

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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.