Home / 18,711,115.20-28,066,672.80-12,971,552.40

Finding the Fourth Proportional to 18,711,115.20, 28,066,672.80 and 12,971,552.40

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Solution

The fourth proportional to 18,711,115.20, 28,066,672.80 and 12,971,552.40 is: 19,457,328.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711,115.20 : 28,066,672.80 = 12,971,552.40 : x
  2. Step 2: Convert to fraction form
    18,711,115.20/28,066,672.80 = 12,971,552.40/x
  3. Step 3: Cross multiply
    18,711,115.20x = 28,066,672.80 × 12,971,552.40
  4. Step 4: Simplify right side
    18,711,115.20x = 364,068,316,918,854.75
  5. Step 5: Solve for x
    x = 364,068,316,918,854.75/18,711,115.20
  6. Step 6: Final answer
    x = 19,457,328.60

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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.