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Finding the Fourth Proportional to 30,407.85, 45,709.85 and 28,196.93

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Solution

The fourth proportional to 30,407.85, 45,709.85 and 28,196.93 is: 42,386.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,407.85 : 45,709.85 = 28,196.93 : x
  2. Step 2: Convert to fraction form
    30,407.85/45,709.85 = 28,196.93/x
  3. Step 3: Cross multiply
    30,407.85x = 45,709.85 × 28,196.93
  4. Step 4: Simplify right side
    30,407.85x = 1,288,877,440.76
  5. Step 5: Solve for x
    x = 1,288,877,440.76/30,407.85
  6. Step 6: Final answer
    x = 42,386.34

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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.