Home / 42,412.40-63,618.60-21,417.20

Finding the Fourth Proportional to 42,412.40, 63,618.60 and 21,417.20

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Solution

The fourth proportional to 42,412.40, 63,618.60 and 21,417.20 is: 32,125.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,412.40 : 63,618.60 = 21,417.20 : x
  2. Step 2: Convert to fraction form
    42,412.40/63,618.60 = 21,417.20/x
  3. Step 3: Cross multiply
    42,412.40x = 63,618.60 × 21,417.20
  4. Step 4: Simplify right side
    42,412.40x = 1,362,532,279.92
  5. Step 5: Solve for x
    x = 1,362,532,279.92/42,412.40
  6. Step 6: Final answer
    x = 32,125.80

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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.