Home / 20,547.60-30,772.80-12,674.40

Finding the Fourth Proportional to 20,547.60, 30,772.80 and 12,674.40

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Solution

The fourth proportional to 20,547.60, 30,772.80 and 12,674.40 is: 18,981.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.60 : 30,772.80 = 12,674.40 : x
  2. Step 2: Convert to fraction form
    20,547.60/30,772.80 = 12,674.40/x
  3. Step 3: Cross multiply
    20,547.60x = 30,772.80 × 12,674.40
  4. Step 4: Simplify right side
    20,547.60x = 390,026,776.32
  5. Step 5: Solve for x
    x = 390,026,776.32/20,547.60
  6. Step 6: Final answer
    x = 18,981.62

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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.