Home / 30,070.14-45,072.81-12,528.78

Finding the Fourth Proportional to 30,070.14, 45,072.81 and 12,528.78

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Solution

The fourth proportional to 30,070.14, 45,072.81 and 12,528.78 is: 18,779.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,070.14 : 45,072.81 = 12,528.78 : x
  2. Step 2: Convert to fraction form
    30,070.14/45,072.81 = 12,528.78/x
  3. Step 3: Cross multiply
    30,070.14x = 45,072.81 × 12,528.78
  4. Step 4: Simplify right side
    30,070.14x = 564,707,320.47
  5. Step 5: Solve for x
    x = 564,707,320.47/30,070.14
  6. Step 6: Final answer
    x = 18,779.67

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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.