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Finding the Fourth Proportional to 12,690.40, 19,041.60 and 8,532.40

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Solution

The fourth proportional to 12,690.40, 19,041.60 and 8,532.40 is: 12,802.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.40 : 19,041.60 = 8,532.40 : x
  2. Step 2: Convert to fraction form
    12,690.40/19,041.60 = 8,532.40/x
  3. Step 3: Cross multiply
    12,690.40x = 19,041.60 × 8,532.40
  4. Step 4: Simplify right side
    12,690.40x = 162,470,547.84
  5. Step 5: Solve for x
    x = 162,470,547.84/12,690.40
  6. Step 6: Final answer
    x = 12,802.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.