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Finding the Fourth Proportional to 9,316, 12,856.15 and 5,124.25

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Solution

The fourth proportional to 9,316, 12,856.15 and 5,124.25 is: 7,071.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,316 : 12,856.15 = 5,124.25 : x
  2. Step 2: Convert to fraction form
    9,316/12,856.15 = 5,124.25/x
  3. Step 3: Cross multiply
    9,316x = 12,856.15 × 5,124.25
  4. Step 4: Simplify right side
    9,316x = 65,878,126.64
  5. Step 5: Solve for x
    x = 65,878,126.64/9,316
  6. Step 6: Final answer
    x = 7,071.50

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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.