Home / 20,812,274.76-28,720,315.65-11,520,225.70

Finding the Fourth Proportional to 20,812,274.76, 28,720,315.65 and 11,520,225.70

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Solution

The fourth proportional to 20,812,274.76, 28,720,315.65 and 11,520,225.70 is: 15,897,566.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812,274.76 : 28,720,315.65 = 11,520,225.70 : x
  2. Step 2: Convert to fraction form
    20,812,274.76/28,720,315.65 = 11,520,225.70/x
  3. Step 3: Cross multiply
    20,812,274.76x = 28,720,315.65 × 11,520,225.70
  4. Step 4: Simplify right side
    20,812,274.76x = 330,864,518,463,242.19
  5. Step 5: Solve for x
    x = 330,864,518,463,242.19/20,812,274.76
  6. Step 6: Final answer
    x = 15,897,566.33

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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.