Home / 20,111,815.80-30,167,723.70-12,931,457.40

Finding the Fourth Proportional to 20,111,815.80, 30,167,723.70 and 12,931,457.40

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Solution

The fourth proportional to 20,111,815.80, 30,167,723.70 and 12,931,457.40 is: 19,397,186.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111,815.80 : 30,167,723.70 = 12,931,457.40 : x
  2. Step 2: Convert to fraction form
    20,111,815.80/30,167,723.70 = 12,931,457.40/x
  3. Step 3: Cross multiply
    20,111,815.80x = 30,167,723.70 × 12,931,457.40
  4. Step 4: Simplify right side
    20,111,815.80x = 390,112,633,881,520.38
  5. Step 5: Solve for x
    x = 390,112,633,881,520.38/20,111,815.80
  6. Step 6: Final answer
    x = 19,397,186.10

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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.