Home / 12,688.60-19,032.90-8,541.40

Finding the Fourth Proportional to 12,688.60, 19,032.90 and 8,541.40

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Solution

The fourth proportional to 12,688.60, 19,032.90 and 8,541.40 is: 12,812.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.60 : 19,032.90 = 8,541.40 : x
  2. Step 2: Convert to fraction form
    12,688.60/19,032.90 = 8,541.40/x
  3. Step 3: Cross multiply
    12,688.60x = 19,032.90 × 8,541.40
  4. Step 4: Simplify right side
    12,688.60x = 162,567,612.06
  5. Step 5: Solve for x
    x = 162,567,612.06/12,688.60
  6. Step 6: Final answer
    x = 12,812.10

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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.