Home / 42,912.05-64,368.47-19,220.76

Finding the Fourth Proportional to 42,912.05, 64,368.47 and 19,220.76

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Solution

The fourth proportional to 42,912.05, 64,368.47 and 19,220.76 is: 28,831.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,912.05 : 64,368.47 = 19,220.76 : x
  2. Step 2: Convert to fraction form
    42,912.05/64,368.47 = 19,220.76/x
  3. Step 3: Cross multiply
    42,912.05x = 64,368.47 × 19,220.76
  4. Step 4: Simplify right side
    42,912.05x = 1,237,210,961.49
  5. Step 5: Solve for x
    x = 1,237,210,961.49/42,912.05
  6. Step 6: Final answer
    x = 28,831.32

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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.