Home / 30,128.91-45,214.08-10,407.50

Finding the Fourth Proportional to 30,128.91, 45,214.08 and 10,407.50

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Solution

The fourth proportional to 30,128.91, 45,214.08 and 10,407.50 is: 15,618.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,128.91 : 45,214.08 = 10,407.50 : x
  2. Step 2: Convert to fraction form
    30,128.91/45,214.08 = 10,407.50/x
  3. Step 3: Cross multiply
    30,128.91x = 45,214.08 × 10,407.50
  4. Step 4: Simplify right side
    30,128.91x = 470,565,537.60
  5. Step 5: Solve for x
    x = 470,565,537.60/30,128.91
  6. Step 6: Final answer
    x = 15,618.41

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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.