Home / 9,129.40-12,603.96-5,775.16

Finding the Fourth Proportional to 9,129.40, 12,603.96 and 5,775.16

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Solution

The fourth proportional to 9,129.40, 12,603.96 and 5,775.16 is: 7,973.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,129.40 : 12,603.96 = 5,775.16 : x
  2. Step 2: Convert to fraction form
    9,129.40/12,603.96 = 5,775.16/x
  3. Step 3: Cross multiply
    9,129.40x = 12,603.96 × 5,775.16
  4. Step 4: Simplify right side
    9,129.40x = 72,789,885.63
  5. Step 5: Solve for x
    x = 72,789,885.63/9,129.40
  6. Step 6: Final answer
    x = 7,973.13

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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.