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Finding the Fourth Proportional to 30,337.60, 45,457.80 and 19,937.20

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Solution

The fourth proportional to 30,337.60, 45,457.80 and 19,937.20 is: 29,873.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,337.60 : 45,457.80 = 19,937.20 : x
  2. Step 2: Convert to fraction form
    30,337.60/45,457.80 = 19,937.20/x
  3. Step 3: Cross multiply
    30,337.60x = 45,457.80 × 19,937.20
  4. Step 4: Simplify right side
    30,337.60x = 906,301,250.16
  5. Step 5: Solve for x
    x = 906,301,250.16/30,337.60
  6. Step 6: Final answer
    x = 29,873.86

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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.