Finding the Fourth Proportional to 28,443,159.36, 39,251,264.85 and 15,390,130.05
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Solution
The fourth proportional to 28,443,159.36, 39,251,264.85 and 15,390,130.05 is: 21,238,219.81
Step by Step Solution
- Step 1: Write the proportion equation
28,443,159.36 : 39,251,264.85 = 15,390,130.05 : x - Step 2: Convert to fraction form
28,443,159.36/39,251,264.85 = 15,390,130.05/x - Step 3: Cross multiply
28,443,159.36x = 39,251,264.85 × 15,390,130.05 - Step 4: Simplify right side
28,443,159.36x = 604,082,070,668,493.75 - Step 5: Solve for x
x = 604,082,070,668,493.75/28,443,159.36 - Step 6: Final answer
x = 21,238,219.81
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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.