Finding the Fourth Proportional to 9,031,128.96, 12,459,740.58 and 5,357,231.40
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Solution
The fourth proportional to 9,031,128.96, 12,459,740.58 and 5,357,231.40 is: 7,391,070.79
Step by Step Solution
- Step 1: Write the proportion equation
9,031,128.96 : 12,459,740.58 = 5,357,231.40 : x - Step 2: Convert to fraction form
9,031,128.96/12,459,740.58 = 5,357,231.40/x - Step 3: Cross multiply
9,031,128.96x = 12,459,740.58 × 5,357,231.40 - Step 4: Simplify right side
9,031,128.96x = 66,749,713,471,030.22 - Step 5: Solve for x
x = 66,749,713,471,030.22/9,031,128.96 - Step 6: Final answer
x = 7,391,070.79
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.