Home / 30,155.60-45,233.40-21,407.60

Finding the Fourth Proportional to 30,155.60, 45,233.40 and 21,407.60

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Solution

The fourth proportional to 30,155.60, 45,233.40 and 21,407.60 is: 32,111.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,155.60 : 45,233.40 = 21,407.60 : x
  2. Step 2: Convert to fraction form
    30,155.60/45,233.40 = 21,407.60/x
  3. Step 3: Cross multiply
    30,155.60x = 45,233.40 × 21,407.60
  4. Step 4: Simplify right side
    30,155.60x = 968,338,533.84
  5. Step 5: Solve for x
    x = 968,338,533.84/30,155.60
  6. Step 6: Final answer
    x = 32,111.40

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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.