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Finding the Fourth Proportional to 7,980.67, 12,030.75 and 7,445.47

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Solution

The fourth proportional to 7,980.67, 12,030.75 and 7,445.47 is: 11,223.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.67 : 12,030.75 = 7,445.47 : x
  2. Step 2: Convert to fraction form
    7,980.67/12,030.75 = 7,445.47/x
  3. Step 3: Cross multiply
    7,980.67x = 12,030.75 × 7,445.47
  4. Step 4: Simplify right side
    7,980.67x = 89,574,588.20
  5. Step 5: Solve for x
    x = 89,574,588.20/7,980.67
  6. Step 6: Final answer
    x = 11,223.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.