Home / 30,657.20-45,947.28-13,106.40

Finding the Fourth Proportional to 30,657.20, 45,947.28 and 13,106.40

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Solution

The fourth proportional to 30,657.20, 45,947.28 and 13,106.40 is: 19,643.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,657.20 : 45,947.28 = 13,106.40 : x
  2. Step 2: Convert to fraction form
    30,657.20/45,947.28 = 13,106.40/x
  3. Step 3: Cross multiply
    30,657.20x = 45,947.28 × 13,106.40
  4. Step 4: Simplify right side
    30,657.20x = 602,203,430.59
  5. Step 5: Solve for x
    x = 602,203,430.59/30,657.20
  6. Step 6: Final answer
    x = 19,643.13

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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.