Home / 28,688.64-39,591.20-15,942.40

Finding the Fourth Proportional to 28,688.64, 39,591.20 and 15,942.40

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Solution

The fourth proportional to 28,688.64, 39,591.20 and 15,942.40 is: 22,001.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,688.64 : 39,591.20 = 15,942.40 : x
  2. Step 2: Convert to fraction form
    28,688.64/39,591.20 = 15,942.40/x
  3. Step 3: Cross multiply
    28,688.64x = 39,591.20 × 15,942.40
  4. Step 4: Simplify right side
    28,688.64x = 631,178,746.88
  5. Step 5: Solve for x
    x = 631,178,746.88/28,688.64
  6. Step 6: Final answer
    x = 22,001.00

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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.