Home / 42,140.12-63,210.16-12,557.20

Finding the Fourth Proportional to 42,140.12, 63,210.16 and 12,557.20

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Solution

The fourth proportional to 42,140.12, 63,210.16 and 12,557.20 is: 18,835.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,140.12 : 63,210.16 = 12,557.20 : x
  2. Step 2: Convert to fraction form
    42,140.12/63,210.16 = 12,557.20/x
  3. Step 3: Cross multiply
    42,140.12x = 63,210.16 × 12,557.20
  4. Step 4: Simplify right side
    42,140.12x = 793,742,621.15
  5. Step 5: Solve for x
    x = 793,742,621.15/42,140.12
  6. Step 6: Final answer
    x = 18,835.79

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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.