Home / 42,712.08-64,066.14-13,128.54

Finding the Fourth Proportional to 42,712.08, 64,066.14 and 13,128.54

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Solution

The fourth proportional to 42,712.08, 64,066.14 and 13,128.54 is: 19,692.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,712.08 : 64,066.14 = 13,128.54 : x
  2. Step 2: Convert to fraction form
    42,712.08/64,066.14 = 13,128.54/x
  3. Step 3: Cross multiply
    42,712.08x = 64,066.14 × 13,128.54
  4. Step 4: Simplify right side
    42,712.08x = 841,094,881.64
  5. Step 5: Solve for x
    x = 841,094,881.64/42,712.08
  6. Step 6: Final answer
    x = 19,692.20

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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.