Home / 8,925.12-12,315.06-5,147.40

Finding the Fourth Proportional to 8,925.12, 12,315.06 and 5,147.40

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Solution

The fourth proportional to 8,925.12, 12,315.06 and 5,147.40 is: 7,102.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,925.12 : 12,315.06 = 5,147.40 : x
  2. Step 2: Convert to fraction form
    8,925.12/12,315.06 = 5,147.40/x
  3. Step 3: Cross multiply
    8,925.12x = 12,315.06 × 5,147.40
  4. Step 4: Simplify right side
    8,925.12x = 63,390,539.84
  5. Step 5: Solve for x
    x = 63,390,539.84/8,925.12
  6. Step 6: Final answer
    x = 7,102.49

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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.