Home / 30,139.95-45,220.86-10,420.50

Finding the Fourth Proportional to 30,139.95, 45,220.86 and 10,420.50

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Solution

The fourth proportional to 30,139.95, 45,220.86 and 10,420.50 is: 15,634.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,139.95 : 45,220.86 = 10,420.50 : x
  2. Step 2: Convert to fraction form
    30,139.95/45,220.86 = 10,420.50/x
  3. Step 3: Cross multiply
    30,139.95x = 45,220.86 × 10,420.50
  4. Step 4: Simplify right side
    30,139.95x = 471,223,971.63
  5. Step 5: Solve for x
    x = 471,223,971.63/30,139.95
  6. Step 6: Final answer
    x = 15,634.53

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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.